80445947 has 2 divisors, whose sum is σ = 80445948. Its totient is φ = 80445946.

The previous prime is 80445941. The next prime is 80445979. The reversal of 80445947 is 74954408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80445947 - 2⁸ = 80445691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80445941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40222973 + 40222974.

It is an arithmetic number, because the mean of its divisors is an integer number (40222974).

Almost surely, 2^80445947 is an apocalyptic number.

80445947 is a deficient number, since it is larger than the sum of its proper divisors (1).

80445947 is an equidigital number, since it uses as much as digits as its factorization.

80445947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 80445947 is about 8969.1664607142. The cubic root of 80445947 is about 431.6860913295.

The spelling of 80445947 in words is "eighty million, four hundred forty-five thousand, nine hundred forty-seven".