687136374 has 12 divisors (see below), whose sum is σ = 1488795516. Its totient is φ = 229045452.

The previous prime is 687136319. The next prime is 687136393. The reversal of 687136374 is 473631786.

687136374 is a `hidden beast` number, since 6 + 8 + 7 + 1 + 3 + 637 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19087104 + ... + 19087139.

It is an arithmetic number, because the mean of its divisors is an integer number (124066293).

Almost surely, 2^687136374 is an apocalyptic number.

687136374 is an abundant number, since it is smaller than the sum of its proper divisors (801659142).

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

687136374 is a wasteful number, since it uses less digits than its factorization.

687136374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38174251 (or 38174248 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 687136374 is about 26213.2862113852. The cubic root of 687136374 is about 882.4314531848.

The spelling of 687136374 in words is "six hundred eighty-seven million, one hundred thirty-six thousand, three hundred seventy-four".