91339399 has 2 divisors, whose sum is σ = 91339400. Its totient is φ = 91339398.

The previous prime is 91339397. The next prime is 91339411. The reversal of 91339399 is 99393319.

It is a weak prime.

It is an emirp because it is prime and its reverse (99393319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91339399 - 2¹ = 91339397 is a prime.

Together with 91339397, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91339393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45669699 + 45669700.

It is an arithmetic number, because the mean of its divisors is an integer number (45669700).

Almost surely, 2^91339399 is an apocalyptic number.

91339399 is a deficient number, since it is larger than the sum of its proper divisors (1).

91339399 is an equidigital number, since it uses as much as digits as its factorization.

91339399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 177147, while the sum is 46.

The square root of 91339399 is about 9557.1647992488. The cubic root of 91339399 is about 450.3526437422.

The spelling of 91339399 in words is "ninety-one million, three hundred thirty-nine thousand, three hundred ninety-nine".