79011621 has 12 divisors (see below), whose sum is σ = 122907148. Its totient is φ = 48622464.

The previous prime is 79011589. The next prime is 79011643. The reversal of 79011621 is 12611097.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 68707521 = 3210^2 + 8289^2 .

It is not a de Polignac number, because 79011621 - 2⁵ = 79011589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79011661) 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, 337540 + ... + 337773.

Almost surely, 2^79011621 is an apocalyptic number.

It is an amenable number.

79011621 is a deficient number, since it is larger than the sum of its proper divisors (43895527).

79011621 is a wasteful number, since it uses less digits than its factorization.

79011621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675332 (or 675329 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 79011621 is about 8888.8481256010. The cubic root of 79011621 is about 429.1050812730.

The spelling of 79011621 in words is "seventy-nine million, eleven thousand, six hundred twenty-one".