135137689 has 8 divisors (see below), whose sum is σ = 136934280. Its totient is φ = 133347456.

The previous prime is 135137687. The next prime is 135137707. The reversal of 135137689 is 986731531.

It can be written as a sum of positive squares in 4 ways, for example, as 2496400 + 132641289 = 1580^2 + 11517^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 135137689 - 2¹ = 135137687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135137687) 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, 53319 + ... + 55795.

It is an arithmetic number, because the mean of its divisors is an integer number (17116785).

Almost surely, 2^135137689 is an apocalyptic number.

It is an amenable number.

135137689 is a deficient number, since it is larger than the sum of its proper divisors (1796591).

135137689 is an equidigital number, since it uses as much as digits as its factorization.

135137689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179.

The product of its digits is 136080, while the sum is 43.

The square root of 135137689 is about 11624.8737197442. The cubic root of 135137689 is about 513.1671283575.

The spelling of 135137689 in words is "one hundred thirty-five million, one hundred thirty-seven thousand, six hundred eighty-nine".