99718139 has 2 divisors, whose sum is σ = 99718140. Its totient is φ = 99718138.

The previous prime is 99718123. The next prime is 99718147. The reversal of 99718139 is 93181799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99718139 - 2⁴ = 99718123 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99718093 and 99718102.

It is not a weakly prime, because it can be changed into another prime (99718159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49859069 + 49859070.

It is an arithmetic number, because the mean of its divisors is an integer number (49859070).

Almost surely, 2^99718139 is an apocalyptic number.

99718139 is a deficient number, since it is larger than the sum of its proper divisors (1).

99718139 is an equidigital number, since it uses as much as digits as its factorization.

99718139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 47.

The square root of 99718139 is about 9985.8970052770. The cubic root of 99718139 is about 463.7223787018.

The spelling of 99718139 in words is "ninety-nine million, seven hundred eighteen thousand, one hundred thirty-nine".