91193128324 has 9 divisors (see below), whose sum is σ = 159589031511. Its totient is φ = 45596262180.

The previous prime is 91193128321. The next prime is 91193128343. The reversal of 91193128324 is 42382139119.

The square root of 91193128324 is 301982.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91193128321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 528469 + ... + 679459.

Almost surely, 2^91193128324 is an apocalyptic number.

91193128324 is the 301982-nd square number.

It is an amenable number.

91193128324 is a deficient number, since it is larger than the sum of its proper divisors (68395903187).

91193128324 is an frugal number, since it uses more digits than its factorization.

91193128324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301986 (or 150993 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The spelling of 91193128324 in words is "ninety-one billion, one hundred ninety-three million, one hundred twenty-eight thousand, three hundred twenty-four".