91358849 has 2 divisors, whose sum is σ = 91358850. Its totient is φ = 91358848.

The previous prime is 91358807. The next prime is 91358857. The reversal of 91358849 is 94885319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 36820624 = 7385^2 + 6068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91358849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91358879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45679424 + 45679425.

It is an arithmetic number, because the mean of its divisors is an integer number (45679425).

Almost surely, 2^91358849 is an apocalyptic number.

It is an amenable number.

91358849 is a deficient number, since it is larger than the sum of its proper divisors (1).

91358849 is an equidigital number, since it uses as much as digits as its factorization.

91358849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 91358849 is about 9558.1823062756. The cubic root of 91358849 is about 450.3846078137.

The spelling of 91358849 in words is "ninety-one million, three hundred fifty-eight thousand, eight hundred forty-nine".