1138935999 has 16 divisors (see below), whose sum is σ = 1541331200. Its totient is φ = 747942336.

The previous prime is 1138935989. The next prime is 1138936031. The reversal of 1138935999 is 9995398311.

It is not a de Polignac number, because 1138935999 - 2⁷ = 1138935871 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138935929) 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 in 15 ways as a sum of consecutive naturals, for example, 198432 + ... + 204090.

It is an arithmetic number, because the mean of its divisors is an integer number (96333200).

Almost surely, 2^1138935999 is an apocalyptic number.

1138935999 is a deficient number, since it is larger than the sum of its proper divisors (402395201).

1138935999 is an equidigital number, since it uses as much as digits as its factorization.

1138935999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6654.

The product of its digits is 2361960, while the sum is 57.

The square root of 1138935999 is about 33748.1258590755. The cubic root of 1138935999 is about 1044.3188250202.

The spelling of 1138935999 in words is "one billion, one hundred thirty-eight million, nine hundred thirty-five thousand, nine hundred ninety-nine".