91719744 has 56 divisors (see below), whose sum is σ = 249253248. Its totient is φ = 29744640.

The previous prime is 91719713. The next prime is 91719757. The reversal of 91719744 is 44791719.

It is a super-2 number, since 2×91719744² = 16825022878851072, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91719696 and 91719705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 13559.

Almost surely, 2^91719744 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 91719744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124626624).

91719744 is an abundant number, since it is smaller than the sum of its proper divisors (157533504).

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

91719744 is a wasteful number, since it uses less digits than its factorization.

91719744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963 (or 12953 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 91719744 is about 9577.0425497645. The cubic root of 91719744 is about 450.9768802789.

It can be divided in two parts, 9171 and 9744, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 91719744 in words is "ninety-one million, seven hundred nineteen thousand, seven hundred forty-four".