138169269 has 36 divisors (see below), whose sum is σ = 234084864. Its totient is φ = 78300432.

The previous prime is 138169243. The next prime is 138169289. The reversal of 138169269 is 962961831.

It is a happy number.

138169269 is a `hidden beast` number, since 1 + 381 + 6 + 9 + 269 = 666.

138169269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138169269 - 2¹² = 138165173 is a prime.

It is a super-2 number, since 2×138169269² = 38181493791988722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138169219) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54774 + ... + 57240.

Almost surely, 2^138169269 is an apocalyptic number.

It is an amenable number.

138169269 is a deficient number, since it is larger than the sum of its proper divisors (95915595).

138169269 is a wasteful number, since it uses less digits than its factorization.

138169269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614 (or 2604 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 138169269 is about 11754.5424836529. The cubic root of 138169269 is about 516.9761246140.

The spelling of 138169269 in words is "one hundred thirty-eight million, one hundred sixty-nine thousand, two hundred sixty-nine".