80919131 has 2 divisors, whose sum is σ = 80919132. Its totient is φ = 80919130.

The previous prime is 80919121. The next prime is 80919143. The reversal of 80919131 is 13191908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80919131 - 2²² = 76724827 is a prime.

It is a super-2 number, since 2×80919131² = 13095811523590322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (80919121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459565 + 40459566.

It is an arithmetic number, because the mean of its divisors is an integer number (40459566).

Almost surely, 2^80919131 is an apocalyptic number.

80919131 is a deficient number, since it is larger than the sum of its proper divisors (1).

80919131 is an equidigital number, since it uses as much as digits as its factorization.

80919131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 80919131 is about 8995.5061558536. The cubic root of 80919131 is about 432.5308314417.

The spelling of 80919131 in words is "eighty million, nine hundred nineteen thousand, one hundred thirty-one".