91198926 has 128 divisors (see below), whose sum is σ = 254069760. Its totient is φ = 23607936.

The previous prime is 91198901. The next prime is 91198937. The reversal of 91198926 is 62989119.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329100 + ... + 329376.

It is an arithmetic number, because the mean of its divisors is an integer number (1984920).

Almost surely, 2^91198926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91198926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127034880).

91198926 is an abundant number, since it is smaller than the sum of its proper divisors (162870834).

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

91198926 is a wasteful number, since it uses less digits than its factorization.

91198926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 369 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 91198926 is about 9549.8128777479. The cubic root of 91198926 is about 450.1216559966.

The spelling of 91198926 in words is "ninety-one million, one hundred ninety-eight thousand, nine hundred twenty-six".