99912097 has 2 divisors, whose sum is σ = 99912098. Its totient is φ = 99912096.

The previous prime is 99912073. The next prime is 99912139. The reversal of 99912097 is 79021999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58232161 + 41679936 = 7631^2 + 6456^2 .

It is a cyclic number.

It is not a de Polignac number, because 99912097 - 2⁷ = 99911969 is a prime.

It is not a weakly prime, because it can be changed into another prime (99912017) 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, 49956048 + 49956049.

It is an arithmetic number, because the mean of its divisors is an integer number (49956049).

Almost surely, 2^99912097 is an apocalyptic number.

It is an amenable number.

99912097 is a deficient number, since it is larger than the sum of its proper divisors (1).

99912097 is an equidigital number, since it uses as much as digits as its factorization.

99912097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 99912097 is about 9995.6038837081. The cubic root of 99912097 is about 464.0228402971.

The spelling of 99912097 in words is "ninety-nine million, nine hundred twelve thousand, ninety-seven".