687338972 has 12 divisors (see below), whose sum is σ = 1222562376. Its totient is φ = 338035440.

The previous prime is 687338959. The next prime is 687338983. The reversal of 687338972 is 279833786.

It is a happy number.

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, 1408238 + ... + 1408725.

It is an arithmetic number, because the mean of its divisors is an integer number (101880198).

Almost surely, 2^687338972 is an apocalyptic number.

It is an amenable number.

687338972 is a deficient number, since it is larger than the sum of its proper divisors (535223404).

687338972 is a wasteful number, since it uses less digits than its factorization.

687338972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817028 (or 2817026 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 53.

The square root of 687338972 is about 26217.1503409505. The cubic root of 687338972 is about 882.5181711865.

The spelling of 687338972 in words is "six hundred eighty-seven million, three hundred thirty-eight thousand, nine hundred seventy-two".