630656987 has 8 divisors (see below), whose sum is σ = 692712960. Its totient is φ = 571487400.

The previous prime is 630656969. The next prime is 630656989. The reversal of 630656987 is 789656036.

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 630656987 - 2⁸ = 630656731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630656989) 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, 721139 + ... + 722012.

It is an arithmetic number, because the mean of its divisors is an integer number (86589120).

Almost surely, 2^630656987 is an apocalyptic number.

630656987 is a deficient number, since it is larger than the sum of its proper divisors (62055973).

630656987 is a wasteful number, since it uses less digits than its factorization.

630656987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443193.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 630656987 is about 25112.8848800770. The cubic root of 630656987 is about 857.5597793694.

The spelling of 630656987 in words is "six hundred thirty million, six hundred fifty-six thousand, nine hundred eighty-seven".