99988997 has 2 divisors, whose sum is σ = 99988998. Its totient is φ = 99988996.

The previous prime is 99988961. The next prime is 99989003. The reversal of 99988997 is 79988999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56085121 + 43903876 = 7489^2 + 6626^2 .

It is a cyclic number.

It is not a de Polignac number, because 99988997 - 2¹⁰ = 99987973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99988597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994498 + 49994499.

It is an arithmetic number, because the mean of its divisors is an integer number (49994499).

Almost surely, 2^99988997 is an apocalyptic number.

It is an amenable number.

99988997 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988997 is an equidigital number, since it uses as much as digits as its factorization.

99988997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 68.

The square root of 99988997 is about 9999.4498348659. The cubic root of 99988997 is about 464.1418589362.

The spelling of 99988997 in words is "ninety-nine million, nine hundred eighty-eight thousand, nine hundred ninety-seven".