630978707 has 4 divisors (see below), whose sum is σ = 631033200. Its totient is φ = 630924216.

The previous prime is 630978703. The next prime is 630978709. The reversal of 630978707 is 707879036.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 630978707 - 2² = 630978703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630978701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207 + ... + 35592.

It is an arithmetic number, because the mean of its divisors is an integer number (157758300).

Almost surely, 2^630978707 is an apocalyptic number.

630978707 is a deficient number, since it is larger than the sum of its proper divisors (54493).

630978707 is a wasteful number, since it uses less digits than its factorization.

630978707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54492.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 630978707 is about 25119.2895401124. The cubic root of 630978707 is about 857.7055782409.

The spelling of 630978707 in words is "six hundred thirty million, nine hundred seventy-eight thousand, seven hundred seven".