99718187 has 2 divisors, whose sum is σ = 99718188. Its totient is φ = 99718186.

The previous prime is 99718159. The next prime is 99718207. The reversal of 99718187 is 78181799.

It is a strong prime.

It is an emirp because it is prime and its reverse (78181799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99718187 - 2⁶ = 99718123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99718147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49859093 + 49859094.

It is an arithmetic number, because the mean of its divisors is an integer number (49859094).

Almost surely, 2^99718187 is an apocalyptic number.

99718187 is a deficient number, since it is larger than the sum of its proper divisors (1).

99718187 is an equidigital number, since it uses as much as digits as its factorization.

99718187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 50.

The square root of 99718187 is about 9985.8994086662. The cubic root of 99718187 is about 463.7224531071.

The spelling of 99718187 in words is "ninety-nine million, seven hundred eighteen thousand, one hundred eighty-seven".