99214991 has 2 divisors, whose sum is σ = 99214992. Its totient is φ = 99214990.

The previous prime is 99214987. The next prime is 99215033. The reversal of 99214991 is 19941299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99214991 - 2² = 99214987 is a prime.

It is a super-2 number, since 2×99214991² = 19687228878260162, which contains 22 as substring.

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 (99214901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49607495 + 49607496.

It is an arithmetic number, because the mean of its divisors is an integer number (49607496).

Almost surely, 2^99214991 is an apocalyptic number.

99214991 is a deficient number, since it is larger than the sum of its proper divisors (1).

99214991 is an equidigital number, since it uses as much as digits as its factorization.

99214991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 44.

The square root of 99214991 is about 9960.6722162713. The cubic root of 99214991 is about 462.9411282821.

The spelling of 99214991 in words is "ninety-nine million, two hundred fourteen thousand, nine hundred ninety-one".