91941912 has 128 divisors (see below), whose sum is σ = 275616000. Its totient is φ = 28304640.

The previous prime is 91941901. The next prime is 91941953. The reversal of 91941912 is 21914919.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176212 + ... + 176732.

It is an arithmetic number, because the mean of its divisors is an integer number (2153250).

Almost surely, 2^91941912 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 91941912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137808000).

91941912 is an abundant number, since it is smaller than the sum of its proper divisors (183674088).

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

91941912 is a wasteful number, since it uses less digits than its factorization.

91941912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 588 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 91941912 is about 9588.6345221830. The cubic root of 91941912 is about 451.3407126764.

The spelling of 91941912 in words is "ninety-one million, nine hundred forty-one thousand, nine hundred twelve".