91319227 has 2 divisors, whose sum is σ = 91319228. Its totient is φ = 91319226.

The previous prime is 91319171. The next prime is 91319233. The reversal of 91319227 is 72291319.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (72291319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91319227 - 2¹¹ = 91317179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91319192 and 91319201.

It is not a weakly prime, because it can be changed into another prime (91319237) 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 as a sum of consecutive naturals, namely, 45659613 + 45659614.

It is an arithmetic number, because the mean of its divisors is an integer number (45659614).

Almost surely, 2^91319227 is an apocalyptic number.

91319227 is a deficient number, since it is larger than the sum of its proper divisors (1).

91319227 is an equidigital number, since it uses as much as digits as its factorization.

91319227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 91319227 is about 9556.1094070757. The cubic root of 91319227 is about 450.3194883442.

The spelling of 91319227 in words is "ninety-one million, three hundred nineteen thousand, two hundred twenty-seven".