1138185169 has 9 divisors (see below), whose sum is σ = 1251471081. Its totient is φ = 1034376420.

The previous prime is 1138185137. The next prime is 1138185179. The reversal of 1138185169 is 9615818311.

The square root of 1138185169 is 33737.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1138185169 - 2⁵ = 1138185137 is a prime.

It is a super-2 number, since 2×1138185169² = 2590930957863117122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138185179) 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 in 8 ways as a sum of consecutive naturals, for example, 369574 + ... + 372640.

Almost surely, 2^1138185169 is an apocalyptic number.

1138185169 is the 33737-th square number.

1138185169 is the 16869-th centered octagonal number.

It is an amenable number.

1138185169 is a deficient number, since it is larger than the sum of its proper divisors (113285912).

1138185169 is an frugal number, since it uses more digits than its factorization.

1138185169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156 (or 3078 counting only the distinct ones).

The product of its digits is 51840, while the sum is 43.

The cubic root of 1138185169 is about 1044.0892896552.

The spelling of 1138185169 in words is "one billion, one hundred thirty-eight million, one hundred eighty-five thousand, one hundred sixty-nine".