80500517 has 2 divisors, whose sum is σ = 80500518. Its totient is φ = 80500516.

The previous prime is 80500499. The next prime is 80500523. The reversal of 80500517 is 71500508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 38328481 = 6494^2 + 6191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80500517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80500597) 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, 40250258 + 40250259.

It is an arithmetic number, because the mean of its divisors is an integer number (40250259).

Almost surely, 2^80500517 is an apocalyptic number.

It is an amenable number.

80500517 is a deficient number, since it is larger than the sum of its proper divisors (1).

80500517 is an equidigital number, since it uses as much as digits as its factorization.

80500517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 80500517 is about 8972.2080337005. The cubic root of 80500517 is about 431.7836797778.

Subtracting from 80500517 its reverse (71500508), we obtain a palindrome (9000009).

The spelling of 80500517 in words is "eighty million, five hundred thousand, five hundred seventeen".