91291339 has 2 divisors, whose sum is σ = 91291340. Its totient is φ = 91291338.

The previous prime is 91291327. The next prime is 91291351. The reversal of 91291339 is 93319219.

It is a balanced prime because it is at equal distance from previous prime (91291327) and next prime (91291351).

It is a cyclic number.

It is not a de Polignac number, because 91291339 - 2⁵ = 91291307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91291298 and 91291307.

It is not a weakly prime, because it can be changed into another prime (91291399) 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, 45645669 + 45645670.

It is an arithmetic number, because the mean of its divisors is an integer number (45645670).

Almost surely, 2^91291339 is an apocalyptic number.

91291339 is a deficient number, since it is larger than the sum of its proper divisors (1).

91291339 is an equidigital number, since it uses as much as digits as its factorization.

91291339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 37.

The square root of 91291339 is about 9554.6501244159. The cubic root of 91291339 is about 450.2736426191.

The spelling of 91291339 in words is "ninety-one million, two hundred ninety-one thousand, three hundred thirty-nine".