1318739 has 2 divisors, whose sum is σ = 1318740. Its totient is φ = 1318738.

The previous prime is 1318729. The next prime is 1318753. The reversal of 1318739 is 9378131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1318739 - 2²⁰ = 270163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1318729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659369 + 659370.

It is an arithmetic number, because the mean of its divisors is an integer number (659370).

2^1318739 is an apocalyptic number.

1318739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318739 is an equidigital number, since it uses as much as digits as its factorization.

1318739 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1318739 is about 1148.3636183718. The cubic root of 1318739 is about 109.6611889040.

The spelling of 1318739 in words is "one million, three hundred eighteen thousand, seven hundred thirty-nine".