91559312 has 40 divisors (see below), whose sum is σ = 196221816. Its totient is φ = 41112576.

The previous prime is 91559311. The next prime is 91559317. The reversal of 91559312 is 21395519.

It can be written as a sum of positive squares in 4 ways, for example, as 45373696 + 46185616 = 6736^2 + 6796^2 .

It is a super-2 number, since 2×91559312² = 16766215227826688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91559311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748 + ... + 13644.

Almost surely, 2^91559312 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 91559312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98110908).

91559312 is an abundant number, since it is smaller than the sum of its proper divisors (104662504).

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

91559312 is a wasteful number, since it uses less digits than its factorization.

91559312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11955 (or 11949 counting only the distinct ones).

The product of its digits is 12150, while the sum is 35.

The square root of 91559312 is about 9568.6630205061. The cubic root of 91559312 is about 450.7137840789.

The spelling of 91559312 in words is "ninety-one million, five hundred fifty-nine thousand, three hundred twelve".