630272621 has 4 divisors (see below), whose sum is σ = 687570144. Its totient is φ = 572975100.

The previous prime is 630272597. The next prime is 630272627. The reversal of 630272621 is 126272036.

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 a de Polignac number, because none of the positive numbers 2^k-630272621 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 (630272627) 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, 28648745 + ... + 28648766.

It is an arithmetic number, because the mean of its divisors is an integer number (171892536).

Almost surely, 2^630272621 is an apocalyptic number.

It is an amenable number.

630272621 is a deficient number, since it is larger than the sum of its proper divisors (57297523).

630272621 is a wasteful number, since it uses less digits than its factorization.

630272621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57297522.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 630272621 is about 25105.2309489477. The cubic root of 630272621 is about 857.3855252104.

The spelling of 630272621 in words is "six hundred thirty million, two hundred seventy-two thousand, six hundred twenty-one".