91338113 has 2 divisors, whose sum is σ = 91338114. Its totient is φ = 91338112.

The previous prime is 91338109. The next prime is 91338131. The reversal of 91338113 is 31183319.

Together with next prime (91338131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83759104 + 7579009 = 9152^2 + 2753^2 .

It is an emirp because it is prime and its reverse (31183319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91338113 - 2² = 91338109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_5290166 and since 91338113 and 5290166 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (91338173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45669056 + 45669057.

It is an arithmetic number, because the mean of its divisors is an integer number (45669057).

Almost surely, 2^91338113 is an apocalyptic number.

It is an amenable number.

91338113 is a deficient number, since it is larger than the sum of its proper divisors (1).

91338113 is an equidigital number, since it uses as much as digits as its factorization.

91338113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 91338113 is about 9557.0975196448. The cubic root of 91338113 is about 450.3505301737.

The spelling of 91338113 in words is "ninety-one million, three hundred thirty-eight thousand, one hundred thirteen".