136853509 has 16 divisors (see below), whose sum is σ = 151300800. Its totient is φ = 123008256.

The previous prime is 136853503. The next prime is 136853513. The reversal of 136853509 is 905358631.

It is a cyclic number.

It is not a de Polignac number, because 136853509 - 2¹¹ = 136851461 is a prime.

It is a super-3 number, since 3×136853509³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136853503) 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, 85882 + ... + 87460.

It is an arithmetic number, because the mean of its divisors is an integer number (9456300).

Almost surely, 2^136853509 is an apocalyptic number.

It is an amenable number.

136853509 is a deficient number, since it is larger than the sum of its proper divisors (14447291).

136853509 is a wasteful number, since it uses less digits than its factorization.

136853509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 136853509 is about 11698.4404516158. The cubic root of 136853509 is about 515.3298656494.

The spelling of 136853509 in words is "one hundred thirty-six million, eight hundred fifty-three thousand, five hundred nine".