79189013 has 8 divisors (see below), whose sum is σ = 80435928. Its totient is φ = 77946624.

The previous prime is 79189003. The next prime is 79189021. The reversal of 79189013 is 31098197.

It can be written as a sum of positive squares in 4 ways, for example, as 30217009 + 48972004 = 5497^2 + 6998^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79189013 - 2¹⁴ = 79172629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79189003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54545 + ... + 55977.

It is an arithmetic number, because the mean of its divisors is an integer number (10054491).

Almost surely, 2^79189013 is an apocalyptic number.

79189013 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

79189013 is a deficient number, since it is larger than the sum of its proper divisors (1246915).

79189013 is a wasteful number, since it uses less digits than its factorization.

79189013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 79189013 is about 8898.8208769477. The cubic root of 79189013 is about 429.4259746305.

The spelling of 79189013 in words is "seventy-nine million, one hundred eighty-nine thousand, thirteen".