11657839 has 2 divisors, whose sum is σ = 11657840. Its totient is φ = 11657838.

The previous prime is 11657809. The next prime is 11657851. The reversal of 11657839 is 93875611.

It is a strong prime.

It is an emirp because it is prime and its reverse (93875611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11657839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11657809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828919 + 5828920.

It is an arithmetic number, because the mean of its divisors is an integer number (5828920).

Almost surely, 2^11657839 is an apocalyptic number.

11657839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11657839 is an equidigital number, since it uses as much as digits as its factorization.

11657839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 11657839 is about 3414.3577727005. The cubic root of 11657839 is about 226.7458520433.

The spelling of 11657839 in words is "eleven million, six hundred fifty-seven thousand, eight hundred thirty-nine".