136388169 has 6 divisors (see below), whose sum is σ = 197005146. Its totient is φ = 90925440.

The previous prime is 136388167. The next prime is 136388191. The reversal of 136388169 is 961883631.

It is a happy number.

136388169 is a `hidden beast` number, since 1 + 3 + 638 + 8 + 1 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 115347600 + 21040569 = 10740^2 + 4587^2 .

It is not a de Polignac number, because 136388169 - 2¹ = 136388167 is a prime.

It is a super-2 number, since 2×136388169² = 37203465286345122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136388167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7577112 + ... + 7577129.

It is an arithmetic number, because the mean of its divisors is an integer number (32834191).

Almost surely, 2^136388169 is an apocalyptic number.

It is an amenable number.

136388169 is a deficient number, since it is larger than the sum of its proper divisors (60616977).

136388169 is a wasteful number, since it uses less digits than its factorization.

136388169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15154247 (or 15154244 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 136388169 is about 11678.5345399155. The cubic root of 136388169 is about 514.7451140765.

The spelling of 136388169 in words is "one hundred thirty-six million, three hundred eighty-eight thousand, one hundred sixty-nine".