79892089 has 2 divisors, whose sum is σ = 79892090. Its totient is φ = 79892088.

The previous prime is 79892081. The next prime is 79892117. The reversal of 79892089 is 98029897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75342400 + 4549689 = 8680^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 79892089 - 2³ = 79892081 is a prime.

It is not a weakly prime, because it can be changed into another prime (79892081) 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 as a sum of consecutive naturals, namely, 39946044 + 39946045.

It is an arithmetic number, because the mean of its divisors is an integer number (39946045).

Almost surely, 2^79892089 is an apocalyptic number.

It is an amenable number.

79892089 is a deficient number, since it is larger than the sum of its proper divisors (1).

79892089 is an equidigital number, since it uses as much as digits as its factorization.

79892089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 79892089 is about 8938.2374660780. The cubic root of 79892089 is about 430.6931114953.

The spelling of 79892089 in words is "seventy-nine million, eight hundred ninety-two thousand, eighty-nine".