91419136 has 80 divisors (see below), whose sum is σ = 194451840. Its totient is φ = 42864640.

The previous prime is 91419131. The next prime is 91419137. The reversal of 91419136 is 63191419.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91419131) 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 7 ways as a sum of consecutive naturals, for example, 697791 + ... + 697921.

It is an arithmetic number, because the mean of its divisors is an integer number (2430648).

Almost surely, 2^91419136 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 91419136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97225920).

91419136 is an abundant number, since it is smaller than the sum of its proper divisors (103032704).

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

91419136 is a wasteful number, since it uses less digits than its factorization.

91419136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 209 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 91419136 is about 9561.3354715751. The cubic root of 91419136 is about 450.4836544735.

The spelling of 91419136 in words is "ninety-one million, four hundred nineteen thousand, one hundred thirty-six".