99142187 has 2 divisors, whose sum is σ = 99142188. Its totient is φ = 99142186.

The previous prime is 99142177. The next prime is 99142189. The reversal of 99142187 is 78124199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99142187 - 2¹⁸ = 98880043 is a prime.

Together with 99142189, 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 (99142189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571093 + 49571094.

It is an arithmetic number, because the mean of its divisors is an integer number (49571094).

Almost surely, 2^99142187 is an apocalyptic number.

99142187 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142187 is an equidigital number, since it uses as much as digits as its factorization.

99142187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 99142187 is about 9957.0169729694. The cubic root of 99142187 is about 462.8278651118.

The spelling of 99142187 in words is "ninety-nine million, one hundred forty-two thousand, one hundred eighty-seven".