91326789 has 12 divisors (see below), whose sum is σ = 132708576. Its totient is φ = 60518952.

The previous prime is 91326757. The next prime is 91326799. The reversal of 91326789 is 98762319.

It is not a de Polignac number, because 91326789 - 2⁵ = 91326757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91326799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28879 + ... + 31884.

It is an arithmetic number, because the mean of its divisors is an integer number (11059048).

Almost surely, 2^91326789 is an apocalyptic number.

It is an amenable number.

91326789 is a deficient number, since it is larger than the sum of its proper divisors (41381787).

91326789 is a wasteful number, since it uses less digits than its factorization.

91326789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60936 (or 60933 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 91326789 is about 9556.5050619983. The cubic root of 91326789 is about 450.3319180814.

The spelling of 91326789 in words is "ninety-one million, three hundred twenty-six thousand, seven hundred eighty-nine".