91513488 has 80 divisors (see below), whose sum is σ = 266268672. Its totient is φ = 26832000.

The previous prime is 91513483. The next prime is 91513493. The reversal of 91513488 is 88431519.

It is an interprime number because it is at equal distance from previous prime (91513483) and next prime (91513493).

It is a super-2 number, since 2×91513488² = 16749436971852288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91513483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13573 + ... + 19163.

Almost surely, 2^91513488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91513488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133134336).

91513488 is an abundant number, since it is smaller than the sum of its proper divisors (174755184).

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

91513488 is a wasteful number, since it uses less digits than its factorization.

91513488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644 (or 5638 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 91513488 is about 9566.2682379285. The cubic root of 91513488 is about 450.6385798041.

The spelling of 91513488 in words is "ninety-one million, five hundred thirteen thousand, four hundred eighty-eight".