91605793 has 8 divisors (see below), whose sum is σ = 93139200. Its totient is φ = 90081888.

The previous prime is 91605791. The next prime is 91605797. The reversal of 91605793 is 39750619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91605793 - 2¹ = 91605791 is a prime.

It is a super-2 number, since 2×91605793² = 16783242622317698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91605791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18573 + ... + 22981.

It is an arithmetic number, because the mean of its divisors is an integer number (11642400).

Almost surely, 2^91605793 is an apocalyptic number.

It is an amenable number.

91605793 is a deficient number, since it is larger than the sum of its proper divisors (1533407).

91605793 is a wasteful number, since it uses less digits than its factorization.

91605793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 91605793 is about 9571.0915260486. The cubic root of 91605793 is about 450.7900409622.

The spelling of 91605793 in words is "ninety-one million, six hundred five thousand, seven hundred ninety-three".