686974797 has 16 divisors (see below), whose sum is σ = 1019800000. Its totient is φ = 457056432.

The previous prime is 686974763. The next prime is 686974807. The reversal of 686974797 is 797479686.

It is not a de Polignac number, because 686974797 - 2¹⁰ = 686973773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686974297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12022 + ... + 38967.

It is an arithmetic number, because the mean of its divisors is an integer number (63737500).

Almost surely, 2^686974797 is an apocalyptic number.

It is an amenable number.

686974797 is a deficient number, since it is larger than the sum of its proper divisors (332825203).

686974797 is a wasteful number, since it uses less digits than its factorization.

686974797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51497 (or 51491 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 686974797 is about 26210.2040625402. The cubic root of 686974797 is about 882.3622811788.

The spelling of 686974797 in words is "six hundred eighty-six million, nine hundred seventy-four thousand, seven hundred ninety-seven".