99427871 has 2 divisors, whose sum is σ = 99427872. Its totient is φ = 99427870.

The previous prime is 99427847. The next prime is 99427891. The reversal of 99427871 is 17872499.

It is a strong prime.

It is an emirp because it is prime and its reverse (17872499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99427871 - 2¹⁸ = 99165727 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99427831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49713935 + 49713936.

It is an arithmetic number, because the mean of its divisors is an integer number (49713936).

Almost surely, 2^99427871 is an apocalyptic number.

99427871 is a deficient number, since it is larger than the sum of its proper divisors (1).

99427871 is an equidigital number, since it uses as much as digits as its factorization.

99427871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 99427871 is about 9971.3525160833. The cubic root of 99427871 is about 463.2719939616.

The spelling of 99427871 in words is "ninety-nine million, four hundred twenty-seven thousand, eight hundred seventy-one".