99009923 has 2 divisors, whose sum is σ = 99009924. Its totient is φ = 99009922.

The previous prime is 99009881. The next prime is 99009929. The reversal of 99009923 is 32990099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99009923 - 2⁸ = 99009667 is a prime.

It is not a weakly prime, because it can be changed into another prime (99009929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49504961 + 49504962.

It is an arithmetic number, because the mean of its divisors is an integer number (49504962).

Almost surely, 2^99009923 is an apocalyptic number.

99009923 is a deficient number, since it is larger than the sum of its proper divisors (1).

99009923 is an equidigital number, since it uses as much as digits as its factorization.

99009923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 99009923 is about 9950.3730080837. The cubic root of 99009923 is about 462.6219564433.

The spelling of 99009923 in words is "ninety-nine million, nine thousand, nine hundred twenty-three".