79372189 has 4 divisors (see below), whose sum is σ = 85477756. Its totient is φ = 73266624.

The previous prime is 79372171. The next prime is 79372193. The reversal of 79372189 is 98127397.

It is a happy number.

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 4549689 + 74822500 = 2133^2 + 8650^2 .

It is a cyclic number.

It is not a de Polignac number, because 79372189 - 2⁷ = 79372061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79372129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3052764 + ... + 3052789.

It is an arithmetic number, because the mean of its divisors is an integer number (21369439).

Almost surely, 2^79372189 is an apocalyptic number.

It is an amenable number.

79372189 is a deficient number, since it is larger than the sum of its proper divisors (6105567).

79372189 is a wasteful number, since it uses less digits than its factorization.

79372189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105566.

The product of its digits is 190512, while the sum is 46.

The square root of 79372189 is about 8909.1070820818. The cubic root of 79372189 is about 429.7568284362.

The spelling of 79372189 in words is "seventy-nine million, three hundred seventy-two thousand, one hundred eighty-nine".