79924081 has 4 divisors (see below), whose sum is σ = 79960564. Its totient is φ = 79887600.

The previous prime is 79924079. The next prime is 79924093. The reversal of 79924081 is 18042997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18042997 = 7 ⋅2577571.

It can be written as a sum of positive squares in 2 ways, for example, as 46457856 + 33466225 = 6816^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 79924081 - 2¹ = 79924079 is a prime.

It is a super-2 number, since 2×79924081² = 12775717447389122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79924001) 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, 14730 + ... + 19411.

It is an arithmetic number, because the mean of its divisors is an integer number (19990141).

Almost surely, 2^79924081 is an apocalyptic number.

It is an amenable number.

79924081 is a deficient number, since it is larger than the sum of its proper divisors (36483).

79924081 is a wasteful number, since it uses less digits than its factorization.

79924081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36482.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 79924081 is about 8940.0269015255. The cubic root of 79924081 is about 430.7505927613.

The spelling of 79924081 in words is "seventy-nine million, nine hundred twenty-four thousand, eighty-one".