80009899 has 2 divisors, whose sum is σ = 80009900. Its totient is φ = 80009898.

The previous prime is 80009863. The next prime is 80009903. The reversal of 80009899 is 99890008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80009899 - 2¹⁹ = 79485611 is a prime.

It is not a weakly prime, because it can be changed into another prime (80009099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40004949 + 40004950.

It is an arithmetic number, because the mean of its divisors is an integer number (40004950).

Almost surely, 2^80009899 is an apocalyptic number.

80009899 is a deficient number, since it is larger than the sum of its proper divisors (1).

80009899 is an equidigital number, since it uses as much as digits as its factorization.

80009899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 80009899 is about 8944.8252638048. The cubic root of 80009899 is about 430.9047095642.

It can be divided in two parts, 80009 and 899, that added together give a palindrome (80908).

The spelling of 80009899 in words is "eighty million, nine thousand, eight hundred ninety-nine".