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672769 = 4161269
BaseRepresentation
bin10100100010000000001
31021011212101
42210100001
5133012034
622230401
75501266
oct2442001
91234771
10672769
1141a509
12285401
131a72b6
1413726d
15d4514
hexa4401

672769 has 8 divisors (see below), whose sum is σ = 703080. Its totient is φ = 643200.

The previous prime is 672767. The next prime is 672779. The reversal of 672769 is 967276.

It can be divided in two parts, 672 and 769, that added together give a palindrome (1441).

It can be written as a sum of positive squares in 4 ways, for example, as 129600 + 543169 = 360^2 + 737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 672769 - 21 = 672767 is a prime.

It is a super-2 number, since 2×6727692 = 905236254722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2367 + ... + 2635.

It is an arithmetic number, because the mean of its divisors is an integer number (87885).

It is a Proth number, since it is equal to 657 ⋅ 210 + 1 and 657 < 210.

2672769 is an apocalyptic number.

It is an amenable number.

672769 is a deficient number, since it is larger than the sum of its proper divisors (30311).

672769 is a wasteful number, since it uses less digits than its factorization.

672769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its digits is 31752, while the sum is 37.

The square root of 672769 is about 820.2249691396. The cubic root of 672769 is about 87.6237812737.

The spelling of 672769 in words is "six hundred seventy-two thousand, seven hundred sixty-nine".

Divisors: 1 41 61 269 2501 11029 16409 672769