91489536 has 54 divisors (see below), whose sum is σ = 263793530. Its totient is φ = 30495744.

The previous prime is 91489523. The next prime is 91489549. The reversal of 91489536 is 63598419.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91489523) and next prime (91489549).

It can be written as a sum of positive squares in only one way, i.e., 89415936 + 2073600 = 9456^2 + 1440^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91489491 and 91489500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17551 + ... + 22158.

Almost surely, 2^91489536 is an apocalyptic number.

91489536 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

91489536 is an abundant number, since it is smaller than the sum of its proper divisors (172303994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91489536 is a wasteful number, since it uses less digits than its factorization.

91489536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39731 (or 39714 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 91489536 is about 9565.0162571738. The cubic root of 91489536 is about 450.5992608748.

The spelling of 91489536 in words is "ninety-one million, four hundred eighty-nine thousand, five hundred thirty-six".