687870998 has 8 divisors (see below), whose sum is σ = 1031922480. Its totient is φ = 343896840.

The previous prime is 687870947. The next prime is 687871013. The reversal of 687870998 is 899078786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 687870998.

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, 15368 + ... + 40148.

It is an arithmetic number, because the mean of its divisors is an integer number (128990310).

Almost surely, 2^687870998 is an apocalyptic number.

687870998 is a deficient number, since it is larger than the sum of its proper divisors (344051482).

687870998 is a wasteful number, since it uses less digits than its factorization.

687870998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The square root of 687870998 is about 26227.2949043549. The cubic root of 687870998 is about 882.7458131221.

The spelling of 687870998 in words is "six hundred eighty-seven million, eight hundred seventy thousand, nine hundred ninety-eight".