135771009 has 16 divisors (see below), whose sum is σ = 197821440. Its totient is φ = 82145360.

The previous prime is 135771007. The next prime is 135771043. The reversal of 135771009 is 900177531.

It is not a de Polignac number, because 135771009 - 2¹ = 135771007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (135771007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18172 + ... + 24530.

It is an arithmetic number, because the mean of its divisors is an integer number (12363840).

Almost surely, 2^135771009 is an apocalyptic number.

It is an amenable number.

135771009 is a deficient number, since it is larger than the sum of its proper divisors (62050431).

135771009 is a wasteful number, since it uses less digits than its factorization.

135771009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 135771009 is about 11652.0817453363. The cubic root of 135771009 is about 513.9675283680.

The spelling of 135771009 in words is "one hundred thirty-five million, seven hundred seventy-one thousand, nine".