135864439 has 4 divisors (see below), whose sum is σ = 135901600. Its totient is φ = 135827280.

The previous prime is 135864431. The next prime is 135864479. The reversal of 135864439 is 934468531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934468531 = 83 ⋅11258657.

It is a cyclic number.

It is not a de Polignac number, because 135864439 - 2³ = 135864431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135864395 and 135864404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135864431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12414 + ... + 20635.

It is an arithmetic number, because the mean of its divisors is an integer number (33975400).

Almost surely, 2^135864439 is an apocalyptic number.

135864439 is a deficient number, since it is larger than the sum of its proper divisors (37161).

135864439 is an equidigital number, since it uses as much as digits as its factorization.

135864439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37160.

The product of its digits is 311040, while the sum is 43.

The square root of 135864439 is about 11656.0902107010. The cubic root of 135864439 is about 514.0853958859.

The spelling of 135864439 in words is "one hundred thirty-five million, eight hundred sixty-four thousand, four hundred thirty-nine".