91097424 has 180 divisors, whose sum is σ = 296930400. Its totient is φ = 25850880.

The previous prime is 91097393. The next prime is 91097429. The reversal of 91097424 is 42479019.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91097429) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 457677 + ... + 457875.

Almost surely, 2^91097424 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 91097424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148465200).

91097424 is an abundant number, since it is smaller than the sum of its proper divisors (205832976).

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

91097424 is a wasteful number, since it uses less digits than its factorization.

91097424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 91097424 is about 9544.4970532763. The cubic root of 91097424 is about 449.9546028278.

The spelling of 91097424 in words is "ninety-one million, ninety-seven thousand, four hundred twenty-four".