1239319717 has 2 divisors, whose sum is σ = 1239319718. Its totient is φ = 1239319716.

The previous prime is 1239319709. The next prime is 1239319733. The reversal of 1239319717 is 7179139321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172309121 + 67010596 = 34239^2 + 8186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239319717 - 2³ = 1239319709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239319747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619659858 + 619659859.

It is an arithmetic number, because the mean of its divisors is an integer number (619659859).

Almost surely, 2^1239319717 is an apocalyptic number.

It is an amenable number.

1239319717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239319717 is an equidigital number, since it uses as much as digits as its factorization.

1239319717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 1239319717 is about 35203.9730286228. The cubic root of 1239319717 is about 1074.1405691237.

The spelling of 1239319717 in words is "one billion, two hundred thirty-nine million, three hundred nineteen thousand, seven hundred seventeen".