80517923 has 2 divisors, whose sum is σ = 80517924. Its totient is φ = 80517922.

The previous prime is 80517919. The next prime is 80517929. The reversal of 80517923 is 32971508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80517923 - 2² = 80517919 is a prime.

It is not a weakly prime, because it can be changed into another prime (80517929) 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, 40258961 + 40258962.

It is an arithmetic number, because the mean of its divisors is an integer number (40258962).

Almost surely, 2^80517923 is an apocalyptic number.

80517923 is a deficient number, since it is larger than the sum of its proper divisors (1).

80517923 is an equidigital number, since it uses as much as digits as its factorization.

80517923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 80517923 is about 8973.1779766145. The cubic root of 80517923 is about 431.8147979428.

The spelling of 80517923 in words is "eighty million, five hundred seventeen thousand, nine hundred twenty-three".