1216370339 has 2 divisors, whose sum is σ = 1216370340. Its totient is φ = 1216370338.

The previous prime is 1216370297. The next prime is 1216370377. The reversal of 1216370339 is 9330736121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216370339 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216370299 and 1216370308.

It is not a weakly prime, because it can be changed into another prime (1216370399) 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, 608185169 + 608185170.

It is an arithmetic number, because the mean of its divisors is an integer number (608185170).

Almost surely, 2^1216370339 is an apocalyptic number.

1216370339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216370339 is an equidigital number, since it uses as much as digits as its factorization.

1216370339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 1216370339 is about 34876.5012436741. The cubic root of 1216370339 is about 1067.4690052008.

The spelling of 1216370339 in words is "one billion, two hundred sixteen million, three hundred seventy thousand, three hundred thirty-nine".