91489965 has 32 divisors (see below), whose sum is σ = 170864640. Its totient is φ = 40931904.

The previous prime is 91489963. The next prime is 91489967. The reversal of 91489965 is 56998419.

It is an interprime number because it is at equal distance from previous prime (91489963) and next prime (91489967).

It is not a de Polignac number, because 91489965 - 2¹ = 91489963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91489963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4335 + ... + 14204.

It is an arithmetic number, because the mean of its divisors is an integer number (5339520).

Almost surely, 2^91489965 is an apocalyptic number.

It is an amenable number.

91489965 is a deficient number, since it is larger than the sum of its proper divisors (79374675).

91489965 is a wasteful number, since it uses less digits than its factorization.

91489965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18601.

The product of its digits is 699840, while the sum is 51.

The square root of 91489965 is about 9565.0386826191. The cubic root of 91489965 is about 450.5999651695.

The spelling of 91489965 in words is "ninety-one million, four hundred eighty-nine thousand, nine hundred sixty-five".