135747909 has 24 divisors (see below), whose sum is σ = 223209792. Its totient is φ = 78693120.

The previous prime is 135747881. The next prime is 135747971. The reversal of 135747909 is 909747531.

135747909 is a `hidden beast` number, since 1 + 3 + 574 + 79 + 0 + 9 = 666.

It is not a de Polignac number, because 135747909 - 2⁸ = 135747653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135747979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27532 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (9300408).

Almost surely, 2^135747909 is an apocalyptic number.

It is an amenable number.

135747909 is a deficient number, since it is larger than the sum of its proper divisors (87461883).

135747909 is a wasteful number, since it uses less digits than its factorization.

135747909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59657 (or 59654 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 135747909 is about 11651.0904639866. The cubic root of 135747909 is about 513.9383780033.

The spelling of 135747909 in words is "one hundred thirty-five million, seven hundred forty-seven thousand, nine hundred nine".