80972291 has 2 divisors, whose sum is σ = 80972292. Its totient is φ = 80972290.

The previous prime is 80972267. The next prime is 80972303. The reversal of 80972291 is 19227908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80972291 - 2²⁶ = 13863427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80972201) 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 as a sum of consecutive naturals, namely, 40486145 + 40486146.

It is an arithmetic number, because the mean of its divisors is an integer number (40486146).

Almost surely, 2^80972291 is an apocalyptic number.

80972291 is a deficient number, since it is larger than the sum of its proper divisors (1).

80972291 is an equidigital number, since it uses as much as digits as its factorization.

80972291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 80972291 is about 8998.4604794376. The cubic root of 80972291 is about 432.6255280661.

The spelling of 80972291 in words is "eighty million, nine hundred seventy-two thousand, two hundred ninety-one".