1138987259 has 2 divisors, whose sum is σ = 1138987260. Its totient is φ = 1138987258.

The previous prime is 1138987247. The next prime is 1138987273. The reversal of 1138987259 is 9527898311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138987259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1138987259.

It is not a weakly prime, because it can be changed into another prime (1138987279) 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, 569493629 + 569493630.

It is an arithmetic number, because the mean of its divisors is an integer number (569493630).

Almost surely, 2^1138987259 is an apocalyptic number.

1138987259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138987259 is an equidigital number, since it uses as much as digits as its factorization.

1138987259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 53.

The square root of 1138987259 is about 33748.8853001103. The cubic root of 1138987259 is about 1044.3344919760.

The spelling of 1138987259 in words is "one billion, one hundred thirty-eight million, nine hundred eighty-seven thousand, two hundred fifty-nine".