11874991 has 4 divisors (see below), whose sum is σ = 11891800. Its totient is φ = 11858184.

The previous prime is 11874979. The next prime is 11875001. The reversal of 11874991 is 19947811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11874991 is a prime.

It is a super-2 number, since 2×11874991² = 282030822500162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11874911) 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, 7296 + ... + 8773.

It is an arithmetic number, because the mean of its divisors is an integer number (2972950).

Almost surely, 2^11874991 is an apocalyptic number.

11874991 is a deficient number, since it is larger than the sum of its proper divisors (16809).

11874991 is an equidigital number, since it uses as much as digits as its factorization.

11874991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808.

The product of its digits is 18144, while the sum is 40.

The square root of 11874991 is about 3446.0108821651. The cubic root of 11874991 is about 228.1450741327.

The spelling of 11874991 in words is "eleven million, eight hundred seventy-four thousand, nine hundred ninety-one".