99997127 has 2 divisors, whose sum is σ = 99997128. Its totient is φ = 99997126.

The previous prime is 99997081. The next prime is 99997129. The reversal of 99997127 is 72179999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99997127 - 2⁶ = 99997063 is a prime.

Together with 99997129, 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 (99997129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998563 + 49998564.

It is an arithmetic number, because the mean of its divisors is an integer number (49998564).

Almost surely, 2^99997127 is an apocalyptic number.

99997127 is a deficient number, since it is larger than the sum of its proper divisors (1).

99997127 is an equidigital number, since it uses as much as digits as its factorization.

99997127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 53.

The square root of 99997127 is about 9999.8563489682. The cubic root of 99997127 is about 464.1544382238.

The spelling of 99997127 in words is "ninety-nine million, nine hundred ninety-seven thousand, one hundred twenty-seven".