1138554169 has 4 divisors (see below), whose sum is σ = 1140051060. Its totient is φ = 1137057280.

The previous prime is 1138554161. The next prime is 1138554199. The reversal of 1138554169 is 9614558311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9614558311 = 38593 ⋅249127.

It can be written as a sum of positive squares in 2 ways, for example, as 579846400 + 558707769 = 24080^2 + 23637^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138554169 - 2³ = 1138554161 is a prime.

It is a super-2 number, since 2×1138554169² = 2592611191494561122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138554161) 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, 747304 + ... + 748825.

It is an arithmetic number, because the mean of its divisors is an integer number (285012765).

Almost surely, 2^1138554169 is an apocalyptic number.

It is an amenable number.

1138554169 is a deficient number, since it is larger than the sum of its proper divisors (1496891).

1138554169 is an equidigital number, since it uses as much as digits as its factorization.

1138554169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496890.

The product of its digits is 129600, while the sum is 43.

The square root of 1138554169 is about 33742.4683299844. The cubic root of 1138554169 is about 1044.2021088259.

The spelling of 1138554169 in words is "one billion, one hundred thirty-eight million, five hundred fifty-four thousand, one hundred sixty-nine".