99688651 has 2 divisors, whose sum is σ = 99688652. Its totient is φ = 99688650.

The previous prime is 99688643. The next prime is 99688657. The reversal of 99688651 is 15688699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99688651 - 2³ = 99688643 is a prime.

It is not a weakly prime, because it can be changed into another prime (99688657) 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, 49844325 + 49844326.

It is an arithmetic number, because the mean of its divisors is an integer number (49844326).

Almost surely, 2^99688651 is an apocalyptic number.

99688651 is a deficient number, since it is larger than the sum of its proper divisors (1).

99688651 is an equidigital number, since it uses as much as digits as its factorization.

99688651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 99688651 is about 9984.4204138247. The cubic root of 99688651 is about 463.6766645394.

The spelling of 99688651 in words is "ninety-nine million, six hundred eighty-eight thousand, six hundred fifty-one".