11881439 has 2 divisors, whose sum is σ = 11881440. Its totient is φ = 11881438.

The previous prime is 11881427. The next prime is 11881447. The reversal of 11881439 is 93418811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11881439 - 2⁴ = 11881423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11881399 and 11881408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11881469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5940719 + 5940720.

It is an arithmetic number, because the mean of its divisors is an integer number (5940720).

Almost surely, 2^11881439 is an apocalyptic number.

11881439 is a deficient number, since it is larger than the sum of its proper divisors (1).

11881439 is an equidigital number, since it uses as much as digits as its factorization.

11881439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 11881439 is about 3446.9463297243. The cubic root of 11881439 is about 228.1863601501.

The spelling of 11881439 in words is "eleven million, eight hundred eighty-one thousand, four hundred thirty-nine".