1138622913 has 28 divisors (see below), whose sum is σ = 1709911060. Its totient is φ = 757856736.

The previous prime is 1138622879. The next prime is 1138622951. The reversal of 1138622913 is 3192268311.

1138622913 is a `hidden beast` number, since 1 + 13 + 8 + 622 + 9 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 649638144 + 488984769 = 25488^2 + 22113^2 .

It is not a de Polignac number, because 1138622913 - 2¹³ = 1138614721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138612913) 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 27 ways as a sum of consecutive naturals, for example, 796083 + ... + 797511.

Almost surely, 2^1138622913 is an apocalyptic number.

It is an amenable number.

1138622913 is a deficient number, since it is larger than the sum of its proper divisors (571288147).

1138622913 is an equidigital number, since it uses as much as digits as its factorization.

1138622913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 2525 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1138622913 is about 33743.4869715624. The cubic root of 1138622913 is about 1044.2231241297.

The spelling of 1138622913 in words is "one billion, one hundred thirty-eight million, six hundred twenty-two thousand, nine hundred thirteen".