91499699 has 2 divisors, whose sum is σ = 91499700. Its totient is φ = 91499698.

The previous prime is 91499641. The next prime is 91499713. The reversal of 91499699 is 99699419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91499699 - 2¹² = 91495603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91499099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45749849 + 45749850.

It is an arithmetic number, because the mean of its divisors is an integer number (45749850).

Almost surely, 2^91499699 is an apocalyptic number.

91499699 is a deficient number, since it is larger than the sum of its proper divisors (1).

91499699 is an equidigital number, since it uses as much as digits as its factorization.

91499699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 56.

The square root of 91499699 is about 9565.5475013195. The cubic root of 91499699 is about 450.6159450077.

The spelling of 91499699 in words is "ninety-one million, four hundred ninety-nine thousand, six hundred ninety-nine".