91093859 has 2 divisors, whose sum is σ = 91093860. Its totient is φ = 91093858.

The previous prime is 91093829. The next prime is 91093867. The reversal of 91093859 is 95839019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91093859 - 2²⁰ = 90045283 is a prime.

It is a super-2 number, since 2×91093859² = 16596182295023762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91093829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45546929 + 45546930.

It is an arithmetic number, because the mean of its divisors is an integer number (45546930).

Almost surely, 2^91093859 is an apocalyptic number.

91093859 is a deficient number, since it is larger than the sum of its proper divisors (1).

91093859 is an equidigital number, since it uses as much as digits as its factorization.

91093859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 91093859 is about 9544.3102946206. The cubic root of 91093859 is about 449.9487332543.

The spelling of 91093859 in words is "ninety-one million, ninety-three thousand, eight hundred fifty-nine".