687163407 has 12 divisors (see below), whose sum is σ = 1065804696. Its totient is φ = 392664720.

The previous prime is 687163369. The next prime is 687163427. The reversal of 687163407 is 704361786.

It is not a de Polignac number, because 687163407 - 2²⁰ = 686114831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687163427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2337144 + ... + 2337437.

It is an arithmetic number, because the mean of its divisors is an integer number (88817058).

Almost surely, 2^687163407 is an apocalyptic number.

687163407 is a deficient number, since it is larger than the sum of its proper divisors (378641289).

687163407 is a wasteful number, since it uses less digits than its factorization.

687163407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674598 (or 4674591 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 687163407 is about 26213.8018417779. The cubic root of 687163407 is about 882.4430251024.

The spelling of 687163407 in words is "six hundred eighty-seven million, one hundred sixty-three thousand, four hundred seven".