91949339 has 2 divisors, whose sum is σ = 91949340. Its totient is φ = 91949338.

The previous prime is 91949287. The next prime is 91949353. The reversal of 91949339 is 93394919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91949339 - 2⁸ = 91949083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91949293 and 91949302.

It is not a weakly prime, because it can be changed into another prime (91949359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45974669 + 45974670.

It is an arithmetic number, because the mean of its divisors is an integer number (45974670).

Almost surely, 2^91949339 is an apocalyptic number.

91949339 is a deficient number, since it is larger than the sum of its proper divisors (1).

91949339 is an equidigital number, since it uses as much as digits as its factorization.

91949339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 47.

The square root of 91949339 is about 9589.0217957829. The cubic root of 91949339 is about 451.3528653394.

The spelling of 91949339 in words is "ninety-one million, nine hundred forty-nine thousand, three hundred thirty-nine".