1244320339 has 2 divisors, whose sum is σ = 1244320340. Its totient is φ = 1244320338.

The previous prime is 1244320291. The next prime is 1244320349. The reversal of 1244320339 is 9330234421.

It is a strong prime.

It is an emirp because it is prime and its reverse (9330234421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244320339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1244320339.

It is not a weakly prime, because it can be changed into another prime (1244320349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622160169 + 622160170.

It is an arithmetic number, because the mean of its divisors is an integer number (622160170).

Almost surely, 2^1244320339 is an apocalyptic number.

1244320339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244320339 is an equidigital number, since it uses as much as digits as its factorization.

1244320339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1244320339 is about 35274.9250743357. The cubic root of 1244320339 is about 1075.5833398611.

The spelling of 1244320339 in words is "one billion, two hundred forty-four million, three hundred twenty thousand, three hundred thirty-nine".