99651899 has 2 divisors, whose sum is σ = 99651900. Its totient is φ = 99651898.

The previous prime is 99651829. The next prime is 99651901. The reversal of 99651899 is 99815699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99651899 - 2¹² = 99647803 is a prime.

Together with 99651901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99651829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49825949 + 49825950.

It is an arithmetic number, because the mean of its divisors is an integer number (49825950).

Almost surely, 2^99651899 is an apocalyptic number.

99651899 is a deficient number, since it is larger than the sum of its proper divisors (1).

99651899 is an equidigital number, since it uses as much as digits as its factorization.

99651899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 56.

The square root of 99651899 is about 9982.5797767912. The cubic root of 99651899 is about 463.6196766436.

The spelling of 99651899 in words is "ninety-nine million, six hundred fifty-one thousand, eight hundred ninety-nine".