91093643 has 4 divisors (see below), whose sum is σ = 91551600. Its totient is φ = 90635688.

The previous prime is 91093631. The next prime is 91093649. The reversal of 91093643 is 34639019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91093643 - 2²² = 86899339 is a prime.

It is a super-2 number, since 2×91093643² = 16596103590022898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91093649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228680 + ... + 229077.

It is an arithmetic number, because the mean of its divisors is an integer number (22887900).

Almost surely, 2^91093643 is an apocalyptic number.

91093643 is a deficient number, since it is larger than the sum of its proper divisors (457957).

91093643 is a wasteful number, since it uses less digits than its factorization.

91093643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457956.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 91093643 is about 9544.2989789717. The cubic root of 91093643 is about 449.9483776174.

The spelling of 91093643 in words is "ninety-one million, ninety-three thousand, six hundred forty-three".