136505769 has 16 divisors (see below), whose sum is σ = 187306560. Its totient is φ = 88375040.

The previous prime is 136505753. The next prime is 136505773. The reversal of 136505769 is 967505631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 136505769 - 2⁴ = 136505753 is a prime.

It is a super-2 number, since 2×136505769² = 37267649940562722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136505769.

It is not an unprimeable number, because it can be changed into a prime (136505729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25477 + ... + 30365.

It is an arithmetic number, because the mean of its divisors is an integer number (11706660).

Almost surely, 2^136505769 is an apocalyptic number.

It is an amenable number.

136505769 is a deficient number, since it is larger than the sum of its proper divisors (50800791).

136505769 is a wasteful number, since it uses less digits than its factorization.

136505769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 136505769 is about 11683.5683333475. The cubic root of 136505769 is about 514.8930170210.

The spelling of 136505769 in words is "one hundred thirty-six million, five hundred five thousand, seven hundred sixty-nine".