99912797 has 2 divisors, whose sum is σ = 99912798. Its totient is φ = 99912796.

The previous prime is 99912733. The next prime is 99912803. The reversal of 99912797 is 79721999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99880036 + 32761 = 9994^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 99912797 - 2⁶ = 99912733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99912727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49956398 + 49956399.

It is an arithmetic number, because the mean of its divisors is an integer number (49956399).

Almost surely, 2^99912797 is an apocalyptic number.

It is an amenable number.

99912797 is a deficient number, since it is larger than the sum of its proper divisors (1).

99912797 is an equidigital number, since it uses as much as digits as its factorization.

99912797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 642978, while the sum is 53.

The square root of 99912797 is about 9995.6388990399. The cubic root of 99912797 is about 464.0239239671.

The spelling of 99912797 in words is "ninety-nine million, nine hundred twelve thousand, seven hundred ninety-seven".