1239314779 has 2 divisors, whose sum is σ = 1239314780. Its totient is φ = 1239314778.

The previous prime is 1239314771. The next prime is 1239314809. The reversal of 1239314779 is 9774139321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1239314779 - 2³ = 1239314771 is a prime.

It is a super-2 number, since 2×1239314779² = 3071802242895637682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1239314771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619657389 + 619657390.

It is an arithmetic number, because the mean of its divisors is an integer number (619657390).

Almost surely, 2^1239314779 is an apocalyptic number.

1239314779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239314779 is an equidigital number, since it uses as much as digits as its factorization.

1239314779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 1239314779 is about 35203.9028944235. The cubic root of 1239314779 is about 1074.1391425041.

It can be divided in two parts, 12393 and 14779, that added together give a palindrome (27172).

The spelling of 1239314779 in words is "one billion, two hundred thirty-nine million, three hundred fourteen thousand, seven hundred seventy-nine".