99812023 has 2 divisors, whose sum is σ = 99812024. Its totient is φ = 99812022.

The previous prime is 99811979. The next prime is 99812039. The reversal of 99812023 is 32021899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99812023 - 2⁹ = 99811511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99812023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99812123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49906011 + 49906012.

It is an arithmetic number, because the mean of its divisors is an integer number (49906012).

Almost surely, 2^99812023 is an apocalyptic number.

99812023 is a deficient number, since it is larger than the sum of its proper divisors (1).

99812023 is an equidigital number, since it uses as much as digits as its factorization.

99812023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 99812023 is about 9990.5967289247. The cubic root of 99812023 is about 463.8678636202.

The spelling of 99812023 in words is "ninety-nine million, eight hundred twelve thousand, twenty-three".