91593641 has 4 divisors (see below), whose sum is σ = 91619472. Its totient is φ = 91567812.

The previous prime is 91593587. The next prime is 91593673. The reversal of 91593641 is 14639519.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91593641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91593595 and 91593604.

It is not an unprimeable number, because it can be changed into a prime (91593041) 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, 6551 + ... + 15036.

It is an arithmetic number, because the mean of its divisors is an integer number (22904868).

Almost surely, 2^91593641 is an apocalyptic number.

It is an amenable number.

91593641 is a deficient number, since it is larger than the sum of its proper divisors (25831).

91593641 is a wasteful number, since it uses less digits than its factorization.

91593641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25830.

The product of its digits is 29160, while the sum is 38.

The square root of 91593641 is about 9570.4566766691. The cubic root of 91593641 is about 450.7701068414.

The spelling of 91593641 in words is "ninety-one million, five hundred ninety-three thousand, six hundred forty-one".