91045893 has 4 divisors (see below), whose sum is σ = 121394528. Its totient is φ = 60697260.

The previous prime is 91045879. The next prime is 91045939. The reversal of 91045893 is 39854019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39854019 = 3 ⋅13284673.

It is not a de Polignac number, because 91045893 - 2⁵ = 91045861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91045813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15174313 + ... + 15174318.

It is an arithmetic number, because the mean of its divisors is an integer number (30348632).

Almost surely, 2^91045893 is an apocalyptic number.

It is an amenable number.

91045893 is a deficient number, since it is larger than the sum of its proper divisors (30348635).

91045893 is a wasteful number, since it uses less digits than its factorization.

91045893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30348634.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 91045893 is about 9541.7971577686. The cubic root of 91045893 is about 449.8697450167.

The spelling of 91045893 in words is "ninety-one million, forty-five thousand, eight hundred ninety-three".