79572289 has 4 divisors (see below), whose sum is σ = 80302420. Its totient is φ = 78842160.

The previous prime is 79572287. The next prime is 79572299. The reversal of 79572289 is 98227597.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46991025 + 32581264 = 6855^2 + 5708^2 .

It is a cyclic number.

It is not a de Polignac number, because 79572289 - 2¹ = 79572287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79572287) 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, 364902 + ... + 365119.

It is an arithmetic number, because the mean of its divisors is an integer number (20075605).

Almost surely, 2^79572289 is an apocalyptic number.

It is an amenable number.

79572289 is a deficient number, since it is larger than the sum of its proper divisors (730131).

79572289 is a wasteful number, since it uses less digits than its factorization.

79572289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730130.

The product of its digits is 635040, while the sum is 49.

The square root of 79572289 is about 8920.3300947891. The cubic root of 79572289 is about 430.1176692572.

The spelling of 79572289 in words is "seventy-nine million, five hundred seventy-two thousand, two hundred eighty-nine".