11919139 has 2 divisors, whose sum is σ = 11919140. Its totient is φ = 11919138.

The previous prime is 11919109. The next prime is 11919157. The reversal of 11919139 is 93191911.

It is a strong prime.

It is an emirp because it is prime and its reverse (93191911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11919139 - 2⁵ = 11919107 is a prime.

It is equal to p₇₈₃₀₈₈ and since 11919139 and 783088 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11919109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959569 + 5959570.

It is an arithmetic number, because the mean of its divisors is an integer number (5959570).

Almost surely, 2^11919139 is an apocalyptic number.

11919139 is a deficient number, since it is larger than the sum of its proper divisors (1).

11919139 is an equidigital number, since it uses as much as digits as its factorization.

11919139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2187, while the sum is 34.

The square root of 11919139 is about 3452.4106070976. The cubic root of 11919139 is about 228.4274516831.

The spelling of 11919139 in words is "eleven million, nine hundred nineteen thousand, one hundred thirty-nine".