91132331 has 2 divisors, whose sum is σ = 91132332. Its totient is φ = 91132330.

The previous prime is 91132319. The next prime is 91132333. The reversal of 91132331 is 13323119.

It is a strong prime.

It is an emirp because it is prime and its reverse (13323119) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91132331 is a prime.

It is a super-2 number, since 2×91132331² = 16610203506987122, which contains 22 as substring.

Together with 91132333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91132297 and 91132306.

It is not a weakly prime, because it can be changed into another prime (91132333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45566165 + 45566166.

It is an arithmetic number, because the mean of its divisors is an integer number (45566166).

Almost surely, 2^91132331 is an apocalyptic number.

91132331 is a deficient number, since it is larger than the sum of its proper divisors (1).

91132331 is an equidigital number, since it uses as much as digits as its factorization.

91132331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 91132331 is about 9546.3255234671. The cubic root of 91132331 is about 450.0120671661.

The spelling of 91132331 in words is "ninety-one million, one hundred thirty-two thousand, three hundred thirty-one".