136259409 has 16 divisors (see below), whose sum is σ = 213441984. Its totient is φ = 76228800.

The previous prime is 136259401. The next prime is 136259413. The reversal of 136259409 is 904952631.

It is not a de Polignac number, because 136259409 - 2³ = 136259401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136259401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158382 + ... + 159239.

It is an arithmetic number, because the mean of its divisors is an integer number (13340124).

Almost surely, 2^136259409 is an apocalyptic number.

It is an amenable number.

136259409 is a deficient number, since it is larger than the sum of its proper divisors (77182575).

136259409 is a wasteful number, since it uses less digits than its factorization.

136259409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317648.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 136259409 is about 11673.0205602492. The cubic root of 136259409 is about 514.5830779079.

The spelling of 136259409 in words is "one hundred thirty-six million, two hundred fifty-nine thousand, four hundred nine".