91383361 has 2 divisors, whose sum is σ = 91383362. Its totient is φ = 91383360.

The previous prime is 91383353. The next prime is 91383421. The reversal of 91383361 is 16338319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63504961 + 27878400 = 7969^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 91383361 - 2³ = 91383353 is a prime.

It is not a weakly prime, because it can be changed into another prime (91383161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45691680 + 45691681.

It is an arithmetic number, because the mean of its divisors is an integer number (45691681).

Almost surely, 2^91383361 is an apocalyptic number.

It is an amenable number.

91383361 is a deficient number, since it is larger than the sum of its proper divisors (1).

91383361 is an equidigital number, since it uses as much as digits as its factorization.

91383361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 91383361 is about 9559.4644724482. The cubic root of 91383361 is about 450.4248843001.

The spelling of 91383361 in words is "ninety-one million, three hundred eighty-three thousand, three hundred sixty-one".