91339393 has 2 divisors, whose sum is σ = 91339394. Its totient is φ = 91339392.

The previous prime is 91339343. The next prime is 91339397. The reversal of 91339393 is 39393319.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84327489 + 7011904 = 9183^2 + 2648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91339393 is a prime.

It is not a weakly prime, because it can be changed into another prime (91339397) 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, 45669696 + 45669697.

It is an arithmetic number, because the mean of its divisors is an integer number (45669697).

Almost surely, 2^91339393 is an apocalyptic number.

It is an amenable number.

91339393 is a deficient number, since it is larger than the sum of its proper divisors (1).

91339393 is an equidigital number, since it uses as much as digits as its factorization.

91339393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59049, while the sum is 40.

The square root of 91339393 is about 9557.1644853482. The cubic root of 91339393 is about 450.3526338811.

The spelling of 91339393 in words is "ninety-one million, three hundred thirty-nine thousand, three hundred ninety-three".