1317839 has 2 divisors, whose sum is σ = 1317840. Its totient is φ = 1317838.

The previous prime is 1317817. The next prime is 1317853. The reversal of 1317839 is 9387131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1317839 - 2⁸ = 1317583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658919 + 658920.

It is an arithmetic number, because the mean of its divisors is an integer number (658920).

2^1317839 is an apocalyptic number.

1317839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317839 is an equidigital number, since it uses as much as digits as its factorization.

1317839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1317839 is about 1147.9716895464. The cubic root of 1317839 is about 109.6362363975.

The spelling of 1317839 in words is "one million, three hundred seventeen thousand, eight hundred thirty-nine".