80976391 has 2 divisors, whose sum is σ = 80976392. Its totient is φ = 80976390.

The previous prime is 80976349. The next prime is 80976407. The reversal of 80976391 is 19367908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80976391 - 2¹¹ = 80974343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80976191) 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, 40488195 + 40488196.

It is an arithmetic number, because the mean of its divisors is an integer number (40488196).

Almost surely, 2^80976391 is an apocalyptic number.

80976391 is a deficient number, since it is larger than the sum of its proper divisors (1).

80976391 is an equidigital number, since it uses as much as digits as its factorization.

80976391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 80976391 is about 8998.6882933014. The cubic root of 80976391 is about 432.6328298838.

The spelling of 80976391 in words is "eighty million, nine hundred seventy-six thousand, three hundred ninety-one".