11439977 has 2 divisors, whose sum is σ = 11439978. Its totient is φ = 11439976.

The previous prime is 11439959. The next prime is 11439979. The reversal of 11439977 is 77993411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11262736 + 177241 = 3356^2 + 421^2 .

It is an emirp because it is prime and its reverse (77993411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11439977 - 2⁸ = 11439721 is a prime.

Together with 11439979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11439979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719988 + 5719989.

It is an arithmetic number, because the mean of its divisors is an integer number (5719989).

Almost surely, 2^11439977 is an apocalyptic number.

It is an amenable number.

11439977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11439977 is an equidigital number, since it uses as much as digits as its factorization.

11439977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 11439977 is about 3382.3035050096. The cubic root of 11439977 is about 225.3244832625.

The spelling of 11439977 in words is "eleven million, four hundred thirty-nine thousand, nine hundred seventy-seven".