686370117 has 32 divisors (see below), whose sum is σ = 1008230400. Its totient is φ = 413404992.

The previous prime is 686370073. The next prime is 686370119. The reversal of 686370117 is 711073686.

It is not a de Polignac number, because 686370117 - 2⁸ = 686369861 is a prime.

It is a super-2 number, since 2×686370117² = 942207875021187378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686370119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 627423 + ... + 628515.

It is an arithmetic number, because the mean of its divisors is an integer number (31507200).

Almost surely, 2^686370117 is an apocalyptic number.

It is an amenable number.

686370117 is a deficient number, since it is larger than the sum of its proper divisors (321860283).

686370117 is a wasteful number, since it uses less digits than its factorization.

686370117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 686370117 is about 26198.6663210172. Note that the first 3 decimals coincide. The cubic root of 686370117 is about 882.1033180421.

The spelling of 686370117 in words is "six hundred eighty-six million, three hundred seventy thousand, one hundred seventeen".