80919953 has 2 divisors, whose sum is σ = 80919954. Its totient is φ = 80919952.

The previous prime is 80919941. The next prime is 80919973. The reversal of 80919953 is 35991908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 12229009 = 8288^2 + 3497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80919953 is a prime.

It is not a weakly prime, because it can be changed into another prime (80919973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459976 + 40459977.

It is an arithmetic number, because the mean of its divisors is an integer number (40459977).

Almost surely, 2^80919953 is an apocalyptic number.

It is an amenable number.

80919953 is a deficient number, since it is larger than the sum of its proper divisors (1).

80919953 is an equidigital number, since it uses as much as digits as its factorization.

80919953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 80919953 is about 8995.5518452177. The cubic root of 80919953 is about 432.5322960279.

The spelling of 80919953 in words is "eighty million, nine hundred nineteen thousand, nine hundred fifty-three".