630530657 has 4 divisors (see below), whose sum is σ = 631138560. Its totient is φ = 629922756.

The previous prime is 630530651. The next prime is 630530723. The reversal of 630530657 is 756035036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630530657 - 2⁸ = 630530401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630530651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302393 + ... + 304470.

It is an arithmetic number, because the mean of its divisors is an integer number (157784640).

Almost surely, 2^630530657 is an apocalyptic number.

It is an amenable number.

630530657 is a deficient number, since it is larger than the sum of its proper divisors (607903).

630530657 is a wasteful number, since it uses less digits than its factorization.

630530657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607902.

The product of its (nonzero) digits is 56700, while the sum is 35.

The square root of 630530657 is about 25110.3695114190. The cubic root of 630530657 is about 857.5025148745.

The spelling of 630530657 in words is "six hundred thirty million, five hundred thirty thousand, six hundred fifty-seven".