99138227 has 2 divisors, whose sum is σ = 99138228. Its totient is φ = 99138226.

The previous prime is 99138199. The next prime is 99138229. The reversal of 99138227 is 72283199.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99138227 - 2⁶ = 99138163 is a prime.

Together with 99138229, 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 (99138229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49569113 + 49569114.

It is an arithmetic number, because the mean of its divisors is an integer number (49569114).

Almost surely, 2^99138227 is an apocalyptic number.

99138227 is a deficient number, since it is larger than the sum of its proper divisors (1).

99138227 is an equidigital number, since it uses as much as digits as its factorization.

99138227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 99138227 is about 9956.8181162458. The cubic root of 99138227 is about 462.8217028419.

The spelling of 99138227 in words is "ninety-nine million, one hundred thirty-eight thousand, two hundred twenty-seven".