91489299 has 16 divisors (see below), whose sum is σ = 133436160. Its totient is φ = 55297760.

The previous prime is 91489283. The next prime is 91489301. The reversal of 91489299 is 99298419.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91489299 - 2⁴ = 91489283 is a prime.

It is a super-2 number, since 2×91489299² = 16740583663022802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91489999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9274 + ... + 16400.

It is an arithmetic number, because the mean of its divisors is an integer number (8339760).

Almost surely, 2^91489299 is an apocalyptic number.

91489299 is a deficient number, since it is larger than the sum of its proper divisors (41946861).

91489299 is a wasteful number, since it uses less digits than its factorization.

91489299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530.

The product of its digits is 419904, while the sum is 51.

The square root of 91489299 is about 9565.0038682690. The cubic root of 91489299 is about 450.5988717880.

The spelling of 91489299 in words is "ninety-one million, four hundred eighty-nine thousand, two hundred ninety-nine".