80491759 has 2 divisors, whose sum is σ = 80491760. Its totient is φ = 80491758.

The previous prime is 80491739. The next prime is 80491769. The reversal of 80491759 is 95719408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80491759 - 2⁵ = 80491727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80491739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40245879 + 40245880.

It is an arithmetic number, because the mean of its divisors is an integer number (40245880).

Almost surely, 2^80491759 is an apocalyptic number.

80491759 is a deficient number, since it is larger than the sum of its proper divisors (1).

80491759 is an equidigital number, since it uses as much as digits as its factorization.

80491759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 80491759 is about 8971.7199577339. The cubic root of 80491759 is about 431.7680206708.

The spelling of 80491759 in words is "eighty million, four hundred ninety-one thousand, seven hundred fifty-nine".