1338257009 has 2 divisors, whose sum is σ = 1338257010. Its totient is φ = 1338257008.

The previous prime is 1338257003. The next prime is 1338257029. The reversal of 1338257009 is 9007528331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240800625 + 97456384 = 35225^2 + 9872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338257009 - 2⁸ = 1338256753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338257003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669128504 + 669128505.

It is an arithmetic number, because the mean of its divisors is an integer number (669128505).

Almost surely, 2^1338257009 is an apocalyptic number.

It is an amenable number.

1338257009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338257009 is an equidigital number, since it uses as much as digits as its factorization.

1338257009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1338257009 is about 36582.1952457750. The cubic root of 1338257009 is about 1101.9955536309.

The spelling of 1338257009 in words is "one billion, three hundred thirty-eight million, two hundred fifty-seven thousand, nine".