91993734 has 48 divisors (see below), whose sum is σ = 231547680. Its totient is φ = 25850880.

The previous prime is 91993703. The next prime is 91993739. The reversal of 91993734 is 43739919.

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 self number, because there is not a number n which added to its sum of digits gives 91993734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91993739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1702 + ... + 13670.

It is an arithmetic number, because the mean of its divisors is an integer number (4823910).

Almost surely, 2^91993734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91993734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115773840).

91993734 is an abundant number, since it is smaller than the sum of its proper divisors (139553946).

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

91993734 is a wasteful number, since it uses less digits than its factorization.

91993734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12045 (or 12042 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 91993734 is about 9591.3364032339. The cubic root of 91993734 is about 451.4254944148.

The spelling of 91993734 in words is "ninety-one million, nine hundred ninety-three thousand, seven hundred thirty-four".