135923109 has 48 divisors (see below), whose sum is σ = 225720000. Its totient is φ = 72285696.

The previous prime is 135923083. The next prime is 135923119. The reversal of 135923109 is 901329531.

It is not a de Polignac number, because 135923109 - 2⁷ = 135922981 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 135923109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135923119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272142 + ... + 272640.

It is an arithmetic number, because the mean of its divisors is an integer number (4702500).

Almost surely, 2^135923109 is an apocalyptic number.

It is an amenable number.

135923109 is a deficient number, since it is larger than the sum of its proper divisors (89796891).

135923109 is a wasteful number, since it uses less digits than its factorization.

135923109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 135923109 is about 11658.6066491670. The cubic root of 135923109 is about 514.1593839727.

The spelling of 135923109 in words is "one hundred thirty-five million, nine hundred twenty-three thousand, one hundred nine".