80745491 has 2 divisors, whose sum is σ = 80745492. Its totient is φ = 80745490.

The previous prime is 80745487. The next prime is 80745493. The reversal of 80745491 is 19454708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80745491 - 2² = 80745487 is a prime.

It is a Sophie Germain prime.

Together with 80745493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80745493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40372745 + 40372746.

It is an arithmetic number, because the mean of its divisors is an integer number (40372746).

Almost surely, 2^80745491 is an apocalyptic number.

80745491 is a deficient number, since it is larger than the sum of its proper divisors (1).

80745491 is an equidigital number, since it uses as much as digits as its factorization.

80745491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 80745491 is about 8985.8494868321. The cubic root of 80745491 is about 432.2212283528.

The spelling of 80745491 in words is "eighty million, seven hundred forty-five thousand, four hundred ninety-one".