686390795 has 8 divisors (see below), whose sum is σ = 823834800. Its totient is φ = 549002080.

The previous prime is 686390777. The next prime is 686390819. The reversal of 686390795 is 597093686.

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

It is not a de Polignac number, because 686390795 - 2⁸ = 686390539 is a prime.

It is a super-2 number, since 2×686390795² = 942264646921464050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21881 + ... + 43029.

It is an arithmetic number, because the mean of its divisors is an integer number (102979350).

Almost surely, 2^686390795 is an apocalyptic number.

686390795 is a deficient number, since it is larger than the sum of its proper divisors (137444005).

686390795 is a wasteful number, since it uses less digits than its factorization.

686390795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27645.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 686390795 is about 26199.0609564541. The cubic root of 686390795 is about 882.1121762120.

The spelling of 686390795 in words is "six hundred eighty-six million, three hundred ninety thousand, seven hundred ninety-five".