80981279 has 2 divisors, whose sum is σ = 80981280. Its totient is φ = 80981278.

The previous prime is 80981267. The next prime is 80981281. The reversal of 80981279 is 97218908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80981279 - 2⁸ = 80981023 is a prime.

Together with 80981281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80981209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40490639 + 40490640.

It is an arithmetic number, because the mean of its divisors is an integer number (40490640).

Almost surely, 2^80981279 is an apocalyptic number.

80981279 is a deficient number, since it is larger than the sum of its proper divisors (1).

80981279 is an equidigital number, since it uses as much as digits as its factorization.

80981279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 80981279 is about 8998.9598843422. The cubic root of 80981279 is about 432.6415347532.

The spelling of 80981279 in words is "eighty million, nine hundred eighty-one thousand, two hundred seventy-nine".