630906947 has 12 divisors (see below), whose sum is σ = 715850688. Its totient is φ = 555046800.

The previous prime is 630906937. The next prime is 630906967. The reversal of 630906947 is 749609036.

It is not a de Polignac number, because 630906947 - 2⁴ = 630906931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630906898 and 630906907.

It is not an unprimeable number, because it can be changed into a prime (630906937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80348 + ... + 87849.

It is an arithmetic number, because the mean of its divisors is an integer number (59654224).

Almost surely, 2^630906947 is an apocalyptic number.

630906947 is a deficient number, since it is larger than the sum of its proper divisors (84943741).

630906947 is a wasteful number, since it uses less digits than its factorization.

630906947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168250 (or 168239 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 630906947 is about 25117.8611151507. The cubic root of 630906947 is about 857.6730619373.

The spelling of 630906947 in words is "six hundred thirty million, nine hundred six thousand, nine hundred forty-seven".