11684591 has 4 divisors (see below), whose sum is σ = 11709072. Its totient is φ = 11660112.

The previous prime is 11684587. The next prime is 11684597. The reversal of 11684591 is 19548611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19548611 = 151 ⋅129461.

It is a cyclic number.

It is not a de Polignac number, because 11684591 - 2² = 11684587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11684597) 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, 11510 + ... + 12483.

It is an arithmetic number, because the mean of its divisors is an integer number (2927268).

Almost surely, 2^11684591 is an apocalyptic number.

11684591 is a deficient number, since it is larger than the sum of its proper divisors (24481).

11684591 is an equidigital number, since it uses as much as digits as its factorization.

11684591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24480.

The product of its digits is 8640, while the sum is 35.

The square root of 11684591 is about 3418.2731020210. The cubic root of 11684591 is about 226.9191623512.

The spelling of 11684591 in words is "eleven million, six hundred eighty-four thousand, five hundred ninety-one".