11439979 has 2 divisors, whose sum is σ = 11439980. Its totient is φ = 11439978.

The previous prime is 11439977. The next prime is 11440003. The reversal of 11439979 is 97993411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11439979 - 2¹ = 11439977 is a prime.

Together with 11439977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11439977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719989 + 5719990.

It is an arithmetic number, because the mean of its divisors is an integer number (5719990).

Almost surely, 2^11439979 is an apocalyptic number.

11439979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11439979 is an equidigital number, since it uses as much as digits as its factorization.

11439979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 11439979 is about 3382.3038006660. The cubic root of 11439979 is about 225.3244963934.

The spelling of 11439979 in words is "eleven million, four hundred thirty-nine thousand, nine hundred seventy-nine".