99914991 has 16 divisors (see below), whose sum is σ = 148877568. Its totient is φ = 59076800.

The previous prime is 99914987. The next prime is 99914993. The reversal of 99914991 is 19941999.

It is a cyclic number.

It is not a de Polignac number, because 99914991 - 2² = 99914987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99914993) 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 in 15 ways as a sum of consecutive naturals, for example, 35571 + ... + 38276.

It is an arithmetic number, because the mean of its divisors is an integer number (9304848).

Almost surely, 2^99914991 is an apocalyptic number.

99914991 is a deficient number, since it is larger than the sum of its proper divisors (48962577).

99914991 is a wasteful number, since it uses less digits than its factorization.

99914991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73902.

The product of its digits is 236196, while the sum is 51.

The square root of 99914991 is about 9995.7486462996. The cubic root of 99914991 is about 464.0273204657.

The spelling of 99914991 in words is "ninety-nine million, nine hundred fourteen thousand, nine hundred ninety-one".