11983591 has 4 divisors (see below), whose sum is σ = 12002872. Its totient is φ = 11964312.

The previous prime is 11983571. The next prime is 11983619. The reversal of 11983591 is 19538911.

It is a happy number.

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 11983591 - 2⁷ = 11983463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11983591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11983501) 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, 8676 + ... + 9961.

It is an arithmetic number, because the mean of its divisors is an integer number (3000718).

Almost surely, 2^11983591 is an apocalyptic number.

11983591 is a deficient number, since it is larger than the sum of its proper divisors (19281).

11983591 is an equidigital number, since it uses as much as digits as its factorization.

11983591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19280.

The product of its digits is 9720, while the sum is 37.

The square root of 11983591 is about 3461.7323697825. The cubic root of 11983591 is about 228.8384474874.

The spelling of 11983591 in words is "eleven million, nine hundred eighty-three thousand, five hundred ninety-one".