1338777019 has 2 divisors, whose sum is σ = 1338777020. Its totient is φ = 1338777018.

The previous prime is 1338777017. The next prime is 1338777079. The reversal of 1338777019 is 9107778331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1338777019 - 2¹ = 1338777017 is a prime.

It is a super-2 number, since 2×1338777019² = 3584647813205052722, which contains 22 as substring.

Together with 1338777017, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1338777019.

It is not a weakly prime, because it can be changed into another prime (1338777017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669388509 + 669388510.

It is an arithmetic number, because the mean of its divisors is an integer number (669388510).

Almost surely, 2^1338777019 is an apocalyptic number.

1338777019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338777019 is an equidigital number, since it uses as much as digits as its factorization.

1338777019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 1338777019 is about 36589.3019747576. The cubic root of 1338777019 is about 1102.1382702382.

The spelling of 1338777019 in words is "one billion, three hundred thirty-eight million, seven hundred seventy-seven thousand, nineteen".