80899873 has 2 divisors, whose sum is σ = 80899874. Its totient is φ = 80899872.

The previous prime is 80899859. The next prime is 80899877. The reversal of 80899873 is 37899808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71115489 + 9784384 = 8433^2 + 3128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80899873 is a prime.

It is a super-2 number, since 2×80899873² = 13089578902832258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80899873.

It is not a weakly prime, because it can be changed into another prime (80899877) 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, 40449936 + 40449937.

It is an arithmetic number, because the mean of its divisors is an integer number (40449937).

Almost surely, 2^80899873 is an apocalyptic number.

It is an amenable number.

80899873 is a deficient number, since it is larger than the sum of its proper divisors (1).

80899873 is an equidigital number, since it uses as much as digits as its factorization.

80899873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 80899873 is about 8994.4356687899. The cubic root of 80899873 is about 432.4965159486.

The spelling of 80899873 in words is "eighty million, eight hundred ninety-nine thousand, eight hundred seventy-three".