91497128 has 32 divisors (see below), whose sum is σ = 189552960. Its totient is φ = 41184000.

The previous prime is 91497127. The next prime is 91497169. The reversal of 91497128 is 82179419.

It is not an unprimeable number, because it can be changed into a prime (91497121) 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, 11498 + ... + 17753.

It is an arithmetic number, because the mean of its divisors is an integer number (5923530).

Almost surely, 2^91497128 is an apocalyptic number.

It is an amenable number.

91497128 is an abundant number, since it is smaller than the sum of its proper divisors (98055832).

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

91497128 is a wasteful number, since it uses less digits than its factorization.

91497128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29297 (or 29293 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 91497128 is about 9565.4131118316. The cubic root of 91497128 is about 450.6117244312.

The spelling of 91497128 in words is "ninety-one million, four hundred ninety-seven thousand, one hundred twenty-eight".