79190989 has 8 divisors (see below), whose sum is σ = 81545720. Its totient is φ = 76847616.

The previous prime is 79190987. The next prime is 79191011. The reversal of 79190989 is 98909197.

It can be written as a sum of positive squares in 4 ways, for example, as 66552964 + 12638025 = 8158^2 + 3555^2 .

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 79190989 - 2¹ = 79190987 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 (79190987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12517 + ... + 17749.

It is an arithmetic number, because the mean of its divisors is an integer number (10193215).

Almost surely, 2^79190989 is an apocalyptic number.

It is an amenable number.

79190989 is a deficient number, since it is larger than the sum of its proper divisors (2354731).

79190989 is a wasteful number, since it uses less digits than its factorization.

79190989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5679.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 79190989 is about 8898.9319022004. The cubic root of 79190989 is about 429.4295464167.

The spelling of 79190989 in words is "seventy-nine million, one hundred ninety thousand, nine hundred eighty-nine".