11912839 has 2 divisors, whose sum is σ = 11912840. Its totient is φ = 11912838.

The previous prime is 11912821. The next prime is 11912851. The reversal of 11912839 is 93821911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11912839 - 2⁵ = 11912807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11912899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5956419 + 5956420.

It is an arithmetic number, because the mean of its divisors is an integer number (5956420).

Almost surely, 2^11912839 is an apocalyptic number.

11912839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11912839 is an equidigital number, since it uses as much as digits as its factorization.

11912839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 11912839 is about 3451.4980805442. The cubic root of 11912839 is about 228.3871985918.

The spelling of 11912839 in words is "eleven million, nine hundred twelve thousand, eight hundred thirty-nine".