80979317 has 2 divisors, whose sum is σ = 80979318. Its totient is φ = 80979316.

The previous prime is 80979307. The next prime is 80979319. The reversal of 80979317 is 71397908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 8916196 = 8489^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 80979317 - 2⁶ = 80979253 is a prime.

Together with 80979319, 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 (80979319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40489658 + 40489659.

It is an arithmetic number, because the mean of its divisors is an integer number (40489659).

Almost surely, 2^80979317 is an apocalyptic number.

It is an amenable number.

80979317 is a deficient number, since it is larger than the sum of its proper divisors (1).

80979317 is an equidigital number, since it uses as much as digits as its factorization.

80979317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 80979317 is about 8998.8508710835. The cubic root of 80979317 is about 432.6380407376.

The spelling of 80979317 in words is "eighty million, nine hundred seventy-nine thousand, three hundred seventeen".