99102721 has 2 divisors, whose sum is σ = 99102722. Its totient is φ = 99102720.

The previous prime is 99102701. The next prime is 99102737. The reversal of 99102721 is 12720199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90459121 + 8643600 = 9511^2 + 2940^2 .

It is a cyclic number.

It is not a de Polignac number, because 99102721 - 2⁷ = 99102593 is a prime.

It is not a weakly prime, because it can be changed into another prime (99102701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49551360 + 49551361.

It is an arithmetic number, because the mean of its divisors is an integer number (49551361).

Almost surely, 2^99102721 is an apocalyptic number.

It is an amenable number.

99102721 is a deficient number, since it is larger than the sum of its proper divisors (1).

99102721 is an equidigital number, since it uses as much as digits as its factorization.

99102721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 99102721 is about 9955.0349572465. The cubic root of 99102721 is about 462.7664436007.

The spelling of 99102721 in words is "ninety-nine million, one hundred two thousand, seven hundred twenty-one".