79104409 has 4 divisors (see below), whose sum is σ = 81242404. Its totient is φ = 76966416.

The previous prime is 79104397. The next prime is 79104413. The reversal of 79104409 is 90440197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90440197 = 4721 ⋅19157.

It can be written as a sum of positive squares in 2 ways, for example, as 40602384 + 38502025 = 6372^2 + 6205^2 .

It is a cyclic number.

It is not a de Polignac number, because 79104409 - 2²¹ = 77007257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79104419) 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, 1068942 + ... + 1069015.

It is an arithmetic number, because the mean of its divisors is an integer number (20310601).

Almost surely, 2^79104409 is an apocalyptic number.

It is an amenable number.

79104409 is a deficient number, since it is larger than the sum of its proper divisors (2137995).

79104409 is a wasteful number, since it uses less digits than its factorization.

79104409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137994.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 79104409 is about 8894.0659430881. The cubic root of 79104409 is about 429.2729900183.

The spelling of 79104409 in words is "seventy-nine million, one hundred four thousand, four hundred nine".