686845926 has 32 divisors (see below), whose sum is σ = 1643735520. Its totient is φ = 211336992.

The previous prime is 686845919. The next prime is 686845933. The reversal of 686845926 is 629548686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (686845919) and next prime (686845933).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488505 + ... + 489908.

It is an arithmetic number, because the mean of its divisors is an integer number (51366735).

Almost surely, 2^686845926 is an apocalyptic number.

686845926 is an abundant number, since it is smaller than the sum of its proper divisors (956889594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686845926 is a wasteful number, since it uses less digits than its factorization.

686845926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978437 (or 978431 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 686845926 is about 26207.7455344789. The cubic root of 686845926 is about 882.3071030164.

The spelling of 686845926 in words is "six hundred eighty-six million, eight hundred forty-five thousand, nine hundred twenty-six".