1138772869 has 6 divisors (see below), whose sum is σ = 1233109266. Its totient is φ = 1051174800.

The previous prime is 1138772861. The next prime is 1138772951. The reversal of 1138772869 is 9682778311.

It can be written as a sum of positive squares in 3 ways, for example, as 160959969 + 977812900 = 12687^2 + 31270^2 .

It is not a de Polignac number, because 1138772869 - 2³ = 1138772861 is a prime.

It is a super-3 number, since 3×1138772869³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138772861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3368982 + ... + 3369319.

It is an arithmetic number, because the mean of its divisors is an integer number (205518211).

Almost surely, 2^1138772869 is an apocalyptic number.

It is an amenable number.

1138772869 is a deficient number, since it is larger than the sum of its proper divisors (94336397).

1138772869 is an equidigital number, since it uses as much as digits as its factorization.

1138772869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738327 (or 6738314 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 52.

The square root of 1138772869 is about 33745.7088975769. The cubic root of 1138772869 is about 1044.2689633176.

The spelling of 1138772869 in words is "one billion, one hundred thirty-eight million, seven hundred seventy-two thousand, eight hundred sixty-nine".