91945938 has 32 divisors (see below), whose sum is σ = 216944640. Its totient is φ = 25422480.

The previous prime is 91945897. The next prime is 91945939. The reversal of 91945938 is 83954919.

It is not an unprimeable number, because it can be changed into a prime (91945939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34008 + ... + 36611.

It is an arithmetic number, because the mean of its divisors is an integer number (6779520).

Almost surely, 2^91945938 is an apocalyptic number.

91945938 is an abundant number, since it is smaller than the sum of its proper divisors (124998702).

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

91945938 is a wasteful number, since it uses less digits than its factorization.

91945938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70662.

The product of its digits is 349920, while the sum is 48.

The square root of 91945938 is about 9588.8444559290. The cubic root of 91945938 is about 451.3473004271.

The spelling of 91945938 in words is "ninety-one million, nine hundred forty-five thousand, nine hundred thirty-eight".