11884991 has 2 divisors, whose sum is σ = 11884992. Its totient is φ = 11884990.

The previous prime is 11884987. The next prime is 11885009. The reversal of 11884991 is 19948811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11884991 - 2² = 11884987 is a prime.

It is a super-2 number, since 2×11884991² = 282506022140162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11884931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5942495 + 5942496.

It is an arithmetic number, because the mean of its divisors is an integer number (5942496).

Almost surely, 2^11884991 is an apocalyptic number.

11884991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11884991 is an equidigital number, since it uses as much as digits as its factorization.

11884991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 41.

The square root of 11884991 is about 3447.4615298796. The cubic root of 11884991 is about 228.2090969358.

The spelling of 11884991 in words is "eleven million, eight hundred eighty-four thousand, nine hundred ninety-one".