11439917 has 2 divisors, whose sum is σ = 11439918. Its totient is φ = 11439916.

The previous prime is 11439887. The next prime is 11439937. The reversal of 11439917 is 71993411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10883401 + 556516 = 3299^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 11439917 - 2⁶ = 11439853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11439937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719958 + 5719959.

It is an arithmetic number, because the mean of its divisors is an integer number (5719959).

Almost surely, 2^11439917 is an apocalyptic number.

It is an amenable number.

11439917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11439917 is an equidigital number, since it uses as much as digits as its factorization.

11439917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 11439917 is about 3382.2946353031. The cubic root of 11439917 is about 225.3240893371.

The spelling of 11439917 in words is "eleven million, four hundred thirty-nine thousand, nine hundred seventeen".