80517919 has 2 divisors, whose sum is σ = 80517920. Its totient is φ = 80517918.

The previous prime is 80517911. The next prime is 80517923. The reversal of 80517919 is 91971508.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80517919 - 2³ = 80517911 is a prime.

It is a super-2 number, since 2×80517919² = 12966270560181122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80517911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40258959 + 40258960.

It is an arithmetic number, because the mean of its divisors is an integer number (40258960).

Almost surely, 2^80517919 is an apocalyptic number.

80517919 is a deficient number, since it is larger than the sum of its proper divisors (1).

80517919 is an equidigital number, since it uses as much as digits as its factorization.

80517919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 80517919 is about 8973.1777537281. The cubic root of 80517919 is about 431.8147907921.

The spelling of 80517919 in words is "eighty million, five hundred seventeen thousand, nine hundred nineteen".