135203859 has 12 divisors (see below), whose sum is σ = 223193776. Its totient is φ = 77259312.

The previous prime is 135203843. The next prime is 135203863. The reversal of 135203859 is 958302531.

It is not a de Polignac number, because 135203859 - 2⁴ = 135203843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135203359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1072984 + ... + 1073109.

Almost surely, 2^135203859 is an apocalyptic number.

135203859 is a deficient number, since it is larger than the sum of its proper divisors (87989917).

135203859 is a wasteful number, since it uses less digits than its factorization.

135203859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146106 (or 2146103 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 135203859 is about 11627.7194238595. The cubic root of 135203859 is about 513.2508719044.

The spelling of 135203859 in words is "one hundred thirty-five million, two hundred three thousand, eight hundred fifty-nine".