80099581 has 2 divisors, whose sum is σ = 80099582. Its totient is φ = 80099580.

The previous prime is 80099549. The next prime is 80099603. The reversal of 80099581 is 18599008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 7338681 = 8530^2 + 2709^2 .

It is a cyclic number.

It is not a de Polignac number, because 80099581 - 2⁵ = 80099549 is a prime.

It is a super-2 number, since 2×80099581² = 12831885752751122, which contains 22 as substring.

It is equal to p_4674856 and since 80099581 and 4674856 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80099681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40049790 + 40049791.

It is an arithmetic number, because the mean of its divisors is an integer number (40049791).

Almost surely, 2^80099581 is an apocalyptic number.

It is an amenable number.

80099581 is a deficient number, since it is larger than the sum of its proper divisors (1).

80099581 is an equidigital number, since it uses as much as digits as its factorization.

80099581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 80099581 is about 8949.8369258886. The cubic root of 80099581 is about 431.0656478438.

The spelling of 80099581 in words is "eighty million, ninety-nine thousand, five hundred eighty-one".