91049239 has 2 divisors, whose sum is σ = 91049240. Its totient is φ = 91049238.

The previous prime is 91049207. The next prime is 91049261. The reversal of 91049239 is 93294019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91049239 - 2⁵ = 91049207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91049198 and 91049207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91049279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45524619 + 45524620.

It is an arithmetic number, because the mean of its divisors is an integer number (45524620).

Almost surely, 2^91049239 is an apocalyptic number.

91049239 is a deficient number, since it is larger than the sum of its proper divisors (1).

91049239 is an equidigital number, since it uses as much as digits as its factorization.

91049239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 91049239 is about 9541.9724900044. The cubic root of 91049239 is about 449.8752559580.

The spelling of 91049239 in words is "ninety-one million, forty-nine thousand, two hundred thirty-nine".