135685737 has 24 divisors (see below), whose sum is σ = 215822880. Its totient is φ = 81458880.

The previous prime is 135685733. The next prime is 135685741. The reversal of 135685737 is 737586531.

135685737 is a `hidden beast` number, since 1 + 3 + 568 + 57 + 37 = 666.

It is an interprime number because it is at equal distance from previous prime (135685733) and next prime (135685741).

It is not a de Polignac number, because 135685737 - 2² = 135685733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135685692 and 135685701.

It is not an unprimeable number, because it can be changed into a prime (135685733) 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, 4189 + ... + 16997.

It is an arithmetic number, because the mean of its divisors is an integer number (8992620).

Almost surely, 2^135685737 is an apocalyptic number.

It is an amenable number.

135685737 is a deficient number, since it is larger than the sum of its proper divisors (80137143).

135685737 is a wasteful number, since it uses less digits than its factorization.

135685737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12933 (or 12930 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 135685737 is about 11648.4220819817. The cubic root of 135685737 is about 513.8599054474.

The spelling of 135685737 in words is "one hundred thirty-five million, six hundred eighty-five thousand, seven hundred thirty-seven".