99808231 has 2 divisors, whose sum is σ = 99808232. Its totient is φ = 99808230.

The previous prime is 99808223. The next prime is 99808243. The reversal of 99808231 is 13280899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99808231 - 2³ = 99808223 is a prime.

It is a super-2 number, since 2×99808231² = 19923365950698722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99808211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49904115 + 49904116.

It is an arithmetic number, because the mean of its divisors is an integer number (49904116).

Almost surely, 2^99808231 is an apocalyptic number.

99808231 is a deficient number, since it is larger than the sum of its proper divisors (1).

99808231 is an equidigital number, since it uses as much as digits as its factorization.

99808231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 99808231 is about 9990.4069486683. The cubic root of 99808231 is about 463.8619892137.

The spelling of 99808231 in words is "ninety-nine million, eight hundred eight thousand, two hundred thirty-one".