91689174 has 48 divisors (see below), whose sum is σ = 210862080. Its totient is φ = 28712880.

The previous prime is 91689149. The next prime is 91689181. The reversal of 91689174 is 47198619.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42379 + ... + 44489.

It is an arithmetic number, because the mean of its divisors is an integer number (4392960).

Almost surely, 2^91689174 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91689174, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105431040).

91689174 is an abundant number, since it is smaller than the sum of its proper divisors (119172906).

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

91689174 is a wasteful number, since it uses less digits than its factorization.

91689174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2262 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 91689174 is about 9575.4464125700. The cubic root of 91689174 is about 450.9267714925.

The spelling of 91689174 in words is "ninety-one million, six hundred eighty-nine thousand, one hundred seventy-four".