1388233009 has 2 divisors, whose sum is σ = 1388233010. Its totient is φ = 1388233008.

The previous prime is 1388232997. The next prime is 1388233051. The reversal of 1388233009 is 9003328831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1285007409 + 103225600 = 35847^2 + 10160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388233009 - 2⁹ = 1388232497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388233079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694116504 + 694116505.

It is an arithmetic number, because the mean of its divisors is an integer number (694116505).

Almost surely, 2^1388233009 is an apocalyptic number.

It is an amenable number.

1388233009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388233009 is an equidigital number, since it uses as much as digits as its factorization.

1388233009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1388233009 is about 37258.9990337905. Note that the first 3 decimals coincide. The cubic root of 1388233009 is about 1115.5459287738.

The spelling of 1388233009 in words is "one billion, three hundred eighty-eight million, two hundred thirty-three thousand, nine".