687907077 has 64 divisors (see below), whose sum is σ = 1117670400. Its totient is φ = 370782720.

The previous prime is 687907067. The next prime is 687907093. The reversal of 687907077 is 770709786.

It is not a de Polignac number, because 687907077 - 2⁶ = 687907013 is a prime.

It is a super-2 number, since 2×687907077² = 946432293173367858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687907037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1641574 + ... + 1641992.

It is an arithmetic number, because the mean of its divisors is an integer number (17463600).

Almost surely, 2^687907077 is an apocalyptic number.

It is an amenable number.

687907077 is a deficient number, since it is larger than the sum of its proper divisors (429763323).

687907077 is a wasteful number, since it uses less digits than its factorization.

687907077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 1037232, while the sum is 51.

The square root of 687907077 is about 26227.9827093126. The cubic root of 687907077 is about 882.7612462626.

The spelling of 687907077 in words is "six hundred eighty-seven million, nine hundred seven thousand, seventy-seven".