11831917 has 2 divisors, whose sum is σ = 11831918. Its totient is φ = 11831916.

The previous prime is 11831873. The next prime is 11831951. The reversal of 11831917 is 71913811.

11831917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6728836 + 5103081 = 2594^2 + 2259^2 .

It is an emirp because it is prime and its reverse (71913811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11831917 - 2¹⁵ = 11799149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11831957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5915958 + 5915959.

It is an arithmetic number, because the mean of its divisors is an integer number (5915959).

Almost surely, 2^11831917 is an apocalyptic number.

It is an amenable number.

11831917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11831917 is an equidigital number, since it uses as much as digits as its factorization.

11831917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 31.

The square root of 11831917 is about 3439.7553692087. The cubic root of 11831917 is about 227.8688907134.

It can be divided in two parts, 118319 and 17, that added together give a square (118336 = 344²).

The spelling of 11831917 in words is "eleven million, eight hundred thirty-one thousand, nine hundred seventeen".