630670621 has 12 divisors (see below), whose sum is σ = 740374140. Its totient is φ = 535610880.

The previous prime is 630670619. The next prime is 630670669. The reversal of 630670621 is 126076036.

630670621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 371911225 + 258759396 = 19285^2 + 16086^2 .

It is not a de Polignac number, because 630670621 - 2¹ = 630670619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630670681) 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, 53700 + ... + 64381.

It is an arithmetic number, because the mean of its divisors is an integer number (61697845).

Almost surely, 2^630670621 is an apocalyptic number.

It is an amenable number.

630670621 is a deficient number, since it is larger than the sum of its proper divisors (109703519).

630670621 is a wasteful number, since it uses less digits than its factorization.

630670621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118204 (or 118197 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 630670621 is about 25113.1563328866. The cubic root of 630670621 is about 857.5659591079.

The spelling of 630670621 in words is "six hundred thirty million, six hundred seventy thousand, six hundred twenty-one".