79005521 has 4 divisors (see below), whose sum is σ = 90292032. Its totient is φ = 67719012.

The previous prime is 79005497. The next prime is 79005539. The reversal of 79005521 is 12550097.

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 79005521 - 2²⁶ = 11896657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79005551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5643245 + ... + 5643258.

It is an arithmetic number, because the mean of its divisors is an integer number (22573008).

Almost surely, 2^79005521 is an apocalyptic number.

It is an amenable number.

79005521 is a deficient number, since it is larger than the sum of its proper divisors (11286511).

79005521 is a wasteful number, since it uses less digits than its factorization.

79005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11286510.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 79005521 is about 8888.5049924045. The cubic root of 79005521 is about 429.0940381364.

The spelling of 79005521 in words is "seventy-nine million, five thousand, five hundred twenty-one".