79992521 has 8 divisors (see below), whose sum is σ = 91614720. Its totient is φ = 68419008.

The previous prime is 79992509. The next prime is 79992559. The reversal of 79992521 is 12529997.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79992521 - 2⁶ = 79992457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79992821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8576 + ... + 15281.

It is an arithmetic number, because the mean of its divisors is an integer number (11451840).

Almost surely, 2^79992521 is an apocalyptic number.

It is an amenable number.

79992521 is a deficient number, since it is larger than the sum of its proper divisors (11622199).

79992521 is a wasteful number, since it uses less digits than its factorization.

79992521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24343.

The product of its digits is 102060, while the sum is 44.

The square root of 79992521 is about 8943.8538114171. The cubic root of 79992521 is about 430.8735100737.

The spelling of 79992521 in words is "seventy-nine million, nine hundred ninety-two thousand, five hundred twenty-one".