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686370337 = 2161317617
BaseRepresentation
bin101000111010010…
…010111000100001
31202211112020002121
4220322102320201
52401202322322
6152035144241
723003023462
oct5072227041
91684466077
10686370337
11322490214
12171a45081
13ac2796c3
146722ad69
15403cdec7
hex28e92e21

686370337 has 4 divisors (see below), whose sum is σ = 686690116. Its totient is φ = 686050560.

The previous prime is 686370331. The next prime is 686370341. The reversal of 686370337 is 733073686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136983616 + 549386721 = 11704^2 + 23439^2 .

It is a cyclic number.

It is not a de Polignac number, because 686370337 - 223 = 677981729 is a prime.

It is a super-2 number, since 2×6863703372 = 942208479026987138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686370293 and 686370302.

It is not an unprimeable number, because it can be changed into a prime (686370331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156648 + ... + 160969.

It is an arithmetic number, because the mean of its divisors is an integer number (171672529).

Almost surely, 2686370337 is an apocalyptic number.

It is an amenable number.

686370337 is a deficient number, since it is larger than the sum of its proper divisors (319779).

686370337 is a wasteful number, since it uses less digits than its factorization.

686370337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319778.

The product of its (nonzero) digits is 381024, while the sum is 43.

The square root of 686370337 is about 26198.6705197039. The cubic root of 686370337 is about 882.1034122880.

The spelling of 686370337 in words is "six hundred eighty-six million, three hundred seventy thousand, three hundred thirty-seven".

Divisors: 1 2161 317617 686370337