687621046 has 64 divisors (see below), whose sum is σ = 1241049600. Its totient is φ = 279691776.

The previous prime is 687621043. The next prime is 687621073. The reversal of 687621046 is 640126786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687621043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4946845 + ... + 4946983.

It is an arithmetic number, because the mean of its divisors is an integer number (19391400).

Almost surely, 2^687621046 is an apocalyptic number.

687621046 is a deficient number, since it is larger than the sum of its proper divisors (553428554).

687621046 is a wasteful number, since it uses less digits than its factorization.

687621046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 687621046 is about 26222.5293593124. The cubic root of 687621046 is about 882.6388789185.

The spelling of 687621046 in words is "six hundred eighty-seven million, six hundred twenty-one thousand, forty-six".