99911087 has 2 divisors, whose sum is σ = 99911088. Its totient is φ = 99911086.

The previous prime is 99911081. The next prime is 99911089. The reversal of 99911087 is 78011999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99911087 - 2²⁶ = 32802223 is a prime.

Together with 99911089, 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 (99911081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49955543 + 49955544.

It is an arithmetic number, because the mean of its divisors is an integer number (49955544).

Almost surely, 2^99911087 is an apocalyptic number.

99911087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99911087 is an equidigital number, since it uses as much as digits as its factorization.

99911087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 99911087 is about 9995.5533613702. The cubic root of 99911087 is about 464.0212767072.

The spelling of 99911087 in words is "ninety-nine million, nine hundred eleven thousand, eighty-seven".