99699997 has 2 divisors, whose sum is σ = 99699998. Its totient is φ = 99699996.

The previous prime is 99699949. The next prime is 99700031. The reversal of 99699997 is 79999699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74839801 + 24860196 = 8651^2 + 4986^2 .

It is a cyclic number.

It is not a de Polignac number, because 99699997 - 2⁷ = 99699869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99699097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49849998 + 49849999.

It is an arithmetic number, because the mean of its divisors is an integer number (49849999).

Almost surely, 2^99699997 is an apocalyptic number.

It is an amenable number.

99699997 is a deficient number, since it is larger than the sum of its proper divisors (1).

99699997 is an equidigital number, since it uses as much as digits as its factorization.

99699997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22320522, while the sum is 67.

The square root of 99699997 is about 9984.9885828678. The cubic root of 99699997 is about 463.6942548930.

The spelling of 99699997 in words is "ninety-nine million, six hundred ninety-nine thousand, nine hundred ninety-seven".