79799521 has 4 divisors (see below), whose sum is σ = 79835392. Its totient is φ = 79763652.

The previous prime is 79799519. The next prime is 79799539. The reversal of 79799521 is 12599797.

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 79799521 - 2¹ = 79799519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79709521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14361 + ... + 19126.

It is an arithmetic number, because the mean of its divisors is an integer number (19958848).

Almost surely, 2^79799521 is an apocalyptic number.

It is an amenable number.

79799521 is a deficient number, since it is larger than the sum of its proper divisors (35871).

79799521 is a wasteful number, since it uses less digits than its factorization.

79799521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35870.

The product of its digits is 357210, while the sum is 49.

The square root of 79799521 is about 8933.0577631626. The cubic root of 79799521 is about 430.5267044982.

The spelling of 79799521 in words is "seventy-nine million, seven hundred ninety-nine thousand, five hundred twenty-one".