135280689 has 8 divisors (see below), whose sum is σ = 184773792. Its totient is φ = 87987360.

The previous prime is 135280681. The next prime is 135280699. The reversal of 135280689 is 986082531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135280689 - 2³ = 135280681 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 135280689.

It is not an unprimeable number, because it can be changed into a prime (135280681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549799 + ... + 550044.

It is an arithmetic number, because the mean of its divisors is an integer number (23096724).

Almost surely, 2^135280689 is an apocalyptic number.

It is an amenable number.

135280689 is a deficient number, since it is larger than the sum of its proper divisors (49493103).

135280689 is a wasteful number, since it uses less digits than its factorization.

135280689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099887.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 135280689 is about 11631.0226979402. The cubic root of 135280689 is about 513.3480722797.

The spelling of 135280689 in words is "one hundred thirty-five million, two hundred eighty thousand, six hundred eighty-nine".