80591501 has 2 divisors, whose sum is σ = 80591502. Its totient is φ = 80591500.

The previous prime is 80591479. The next prime is 80591507. The reversal of 80591501 is 10519508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75707401 + 4884100 = 8701^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 80591501 - 2¹⁸ = 80329357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80591507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40295750 + 40295751.

It is an arithmetic number, because the mean of its divisors is an integer number (40295751).

Almost surely, 2^80591501 is an apocalyptic number.

It is an amenable number.

80591501 is a deficient number, since it is larger than the sum of its proper divisors (1).

80591501 is an equidigital number, since it uses as much as digits as its factorization.

80591501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 80591501 is about 8977.2769256607. The cubic root of 80591501 is about 431.9462899761.

The spelling of 80591501 in words is "eighty million, five hundred ninety-one thousand, five hundred one".