687722164 has 12 divisors (see below), whose sum is σ = 1203852384. Its totient is φ = 343764344.

The previous prime is 687722141. The next prime is 687722213. The reversal of 687722164 is 461227786.

It is a self number, because there is not a number n which added to its sum of digits gives 687722164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802 + ... + 37705.

It is an arithmetic number, because the mean of its divisors is an integer number (100321032).

Almost surely, 2^687722164 is an apocalyptic number.

It is an amenable number.

687722164 is a deficient number, since it is larger than the sum of its proper divisors (516130220).

687722164 is a wasteful number, since it uses less digits than its factorization.

687722164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48374 (or 48372 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 687722164 is about 26224.4573633088. The cubic root of 687722164 is about 882.6821422363.

The spelling of 687722164 in words is "six hundred eighty-seven million, seven hundred twenty-two thousand, one hundred sixty-four".