1313239 has 2 divisors, whose sum is σ = 1313240. Its totient is φ = 1313238.

The previous prime is 1313237. The next prime is 1313293. The reversal of 1313239 is 9323131.

Together with next prime (1313293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313239 - 2¹ = 1313237 is a prime.

It is a super-2 number, since 2×1313239² = 3449193342242, which contains 22 as substring.

Together with 1313237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656619 + 656620.

It is an arithmetic number, because the mean of its divisors is an integer number (656620).

2^1313239 is an apocalyptic number.

1313239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313239 is an equidigital number, since it uses as much as digits as its factorization.

1313239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 22.

The square root of 1313239 is about 1145.9664043941. The cubic root of 1313239 is about 109.5085236236.

The spelling of 1313239 in words is "one million, three hundred thirteen thousand, two hundred thirty-nine".