79072291 has 2 divisors, whose sum is σ = 79072292. Its totient is φ = 79072290.

The previous prime is 79072271. The next prime is 79072297. The reversal of 79072291 is 19227097.

79072291 = T₇₂₅₉ + T₇₂₆₀ + T₇₂₆₁.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79072291 - 2⁹ = 79071779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79072291.

It is not a weakly prime, because it can be changed into another prime (79072297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39536145 + 39536146.

It is an arithmetic number, because the mean of its divisors is an integer number (39536146).

Almost surely, 2^79072291 is an apocalyptic number.

79072291 is the 7261-st centered triangular number.

79072291 is a deficient number, since it is larger than the sum of its proper divisors (1).

79072291 is an equidigital number, since it uses as much as digits as its factorization.

79072291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 79072291 is about 8892.2601738816. The cubic root of 79072291 is about 429.2148842966.

The spelling of 79072291 in words is "seventy-nine million, seventy-two thousand, two hundred ninety-one".