91963572 has 48 divisors (see below), whose sum is σ = 227673600. Its totient is φ = 28810080.

The previous prime is 91963561. The next prime is 91963583. The reversal of 91963572 is 27536919.

It is an interprime number because it is at equal distance from previous prime (91963561) and next prime (91963583).

It is a super-3 number, since 3×91963572³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28329 + ... + 31407.

It is an arithmetic number, because the mean of its divisors is an integer number (4743200).

Almost surely, 2^91963572 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 91963572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113836800).

91963572 is an abundant number, since it is smaller than the sum of its proper divisors (135710028).

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

91963572 is a wasteful number, since it uses less digits than its factorization.

91963572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236 (or 3234 counting only the distinct ones).

The product of its digits is 102060, while the sum is 42.

The square root of 91963572 is about 9589.7639178449. The cubic root of 91963572 is about 451.3761527060.

The spelling of 91963572 in words is "ninety-one million, nine hundred sixty-three thousand, five hundred seventy-two".