79630621 has 4 divisors (see below), whose sum is σ = 91006432. Its totient is φ = 68254812.

The previous prime is 79630609. The next prime is 79630631. The reversal of 79630621 is 12603697.

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 79630621 - 2⁷ = 79630493 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 (79630631) 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, 5687895 + ... + 5687908.

It is an arithmetic number, because the mean of its divisors is an integer number (22751608).

Almost surely, 2^79630621 is an apocalyptic number.

It is an amenable number.

79630621 is a deficient number, since it is larger than the sum of its proper divisors (11375811).

79630621 is a wasteful number, since it uses less digits than its factorization.

79630621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375810.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 79630621 is about 8923.5991057420. The cubic root of 79630621 is about 430.2227456009. Note that the first 3 decimals are identical.

The spelling of 79630621 in words is "seventy-nine million, six hundred thirty thousand, six hundred twenty-one".