91775712 has 96 divisors (see below), whose sum is σ = 282127104. Its totient is φ = 25574400.

The previous prime is 91775699. The next prime is 91775731. The reversal of 91775712 is 21757719.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25887 + ... + 29217.

It is an arithmetic number, because the mean of its divisors is an integer number (2938824).

Almost surely, 2^91775712 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 91775712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141063552).

91775712 is an abundant number, since it is smaller than the sum of its proper divisors (190351392).

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

91775712 is a wasteful number, since it uses less digits than its factorization.

91775712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392 (or 3384 counting only the distinct ones).

The product of its digits is 30870, while the sum is 39.

The square root of 91775712 is about 9579.9640917907. The cubic root of 91775712 is about 451.0685913280.

The spelling of 91775712 in words is "ninety-one million, seven hundred seventy-five thousand, seven hundred twelve".