1338240019 has 2 divisors, whose sum is σ = 1338240020. Its totient is φ = 1338240018.

The previous prime is 1338239999. The next prime is 1338240049. The reversal of 1338240019 is 9100428331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1338240019 - 2⁷ = 1338239891 is a prime.

It is a super-2 number, since 2×1338240019² = 3581772696906240722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1338240049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669120009 + 669120010.

It is an arithmetic number, because the mean of its divisors is an integer number (669120010).

Almost surely, 2^1338240019 is an apocalyptic number.

1338240019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338240019 is an equidigital number, since it uses as much as digits as its factorization.

1338240019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1338240019 is about 36581.9630282466. The cubic root of 1338240019 is about 1101.9908901062.

The spelling of 1338240019 in words is "one billion, three hundred thirty-eight million, two hundred forty thousand, nineteen".