91085263 has 2 divisors, whose sum is σ = 91085264. Its totient is φ = 91085262.

The previous prime is 91085257. The next prime is 91085273. The reversal of 91085263 is 36258019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91085263 - 2¹³ = 91077071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91085213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45542631 + 45542632.

It is an arithmetic number, because the mean of its divisors is an integer number (45542632).

Almost surely, 2^91085263 is an apocalyptic number.

91085263 is a deficient number, since it is larger than the sum of its proper divisors (1).

91085263 is an equidigital number, since it uses as much as digits as its factorization.

91085263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 91085263 is about 9543.8599633482. The cubic root of 91085263 is about 449.9345797902.

The spelling of 91085263 in words is "ninety-one million, eighty-five thousand, two hundred sixty-three".