687938614957 has 8 divisors (see below), whose sum is σ = 761048609472. Its totient is φ = 616590307200.

The previous prime is 687938614931. The next prime is 687938614973. The reversal of 687938614957 is 759416839786.

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

It is a cyclic number.

It is not a de Polignac number, because 687938614957 - 2¹⁵ = 687938582189 is a prime.

It is a super-2 number, since 2×687938614957² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687938614957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687938614057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440420868 + ... + 440422429.

It is an arithmetic number, because the mean of its divisors is an integer number (95131076184).

Almost surely, 2^687938614957 is an apocalyptic number.

It is an amenable number.

687938614957 is a deficient number, since it is larger than the sum of its proper divisors (73109994515).

687938614957 is a wasteful number, since it uses less digits than its factorization.

687938614957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880843379.

The product of its digits is 548674560, while the sum is 73.

The spelling of 687938614957 in words is "six hundred eighty-seven billion, nine hundred thirty-eight million, six hundred fourteen thousand, nine hundred fifty-seven".