1138585889 has 4 divisors (see below), whose sum is σ = 1301241024. Its totient is φ = 975930756.

The previous prime is 1138585879. The next prime is 1138585913. The reversal of 1138585889 is 9885858311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1138585889 - 2¹² = 1138581793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138585879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81327557 + ... + 81327570.

It is an arithmetic number, because the mean of its divisors is an integer number (325310256).

Almost surely, 2^1138585889 is an apocalyptic number.

It is an amenable number.

1138585889 is a deficient number, since it is larger than the sum of its proper divisors (162655135).

1138585889 is an equidigital number, since it uses as much as digits as its factorization.

1138585889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162655134.

The product of its digits is 2764800, while the sum is 56.

The square root of 1138585889 is about 33742.9383575290. The cubic root of 1138585889 is about 1044.2118058564.

The spelling of 1138585889 in words is "one billion, one hundred thirty-eight million, five hundred eighty-five thousand, eight hundred eighty-nine".