630557397 has 24 divisors (see below), whose sum is σ = 951662400. Its totient is φ = 401563008.

The previous prime is 630557383. The next prime is 630557401. The reversal of 630557397 is 793755036.

630557397 is a `hidden beast` number, since 6 + 3 + 0 + 557 + 3 + 97 = 666.

630557397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 630557397 - 2¹⁰ = 630556373 is a prime.

It is a super-2 number, since 2×630557397² = 795205261822831218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630557357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207354 + ... + 210372.

It is an arithmetic number, because the mean of its divisors is an integer number (39652600).

Almost surely, 2^630557397 is an apocalyptic number.

It is an amenable number.

630557397 is a deficient number, since it is larger than the sum of its proper divisors (321105003).

630557397 is a wasteful number, since it uses less digits than its factorization.

630557397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 45.

The square root of 630557397 is about 25110.9019551270. The cubic root of 630557397 is about 857.5146365653.

The spelling of 630557397 in words is "six hundred thirty million, five hundred fifty-seven thousand, three hundred ninety-seven".