99128927 has 2 divisors, whose sum is σ = 99128928. Its totient is φ = 99128926.

The previous prime is 99128923. The next prime is 99128929. The reversal of 99128927 is 72982199.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99128927 - 2² = 99128923 is a prime.

Together with 99128929, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99128923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49564463 + 49564464.

It is an arithmetic number, because the mean of its divisors is an integer number (49564464).

Almost surely, 2^99128927 is an apocalyptic number.

99128927 is a deficient number, since it is larger than the sum of its proper divisors (1).

99128927 is an equidigital number, since it uses as much as digits as its factorization.

99128927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 99128927 is about 9956.3510886268. The cubic root of 99128927 is about 462.8072301991.

The spelling of 99128927 in words is "ninety-nine million, one hundred twenty-eight thousand, nine hundred twenty-seven".