91499120 has 80 divisors (see below), whose sum is σ = 219360960. Its totient is φ = 35481600.

The previous prime is 91499119. The next prime is 91499131. The reversal of 91499120 is 2199419.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505430 + ... + 505610.

It is an arithmetic number, because the mean of its divisors is an integer number (2742012).

Almost surely, 2^91499120 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 91499120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109680480).

91499120 is an abundant number, since it is smaller than the sum of its proper divisors (127861840).

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

91499120 is a wasteful number, since it uses less digits than its factorization.

91499120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 91499120 is about 9565.5172364070. The cubic root of 91499120 is about 450.6149945230.

It can be divided in two parts, 91499 and 120, that added together give a palindrome (91619).

The spelling of 91499120 in words is "ninety-one million, four hundred ninety-nine thousand, one hundred twenty".