135078689 has 8 divisors (see below), whose sum is σ = 137262600. Its totient is φ = 132903936.

The previous prime is 135078673. The next prime is 135078709. The reversal of 135078689 is 986870531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30691600 + 104387089 = 5540^2 + 10217^2 .

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 135078689 - 2⁴ = 135078673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135078649) 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, 31337 + ... + 35385.

It is an arithmetic number, because the mean of its divisors is an integer number (17157825).

Almost surely, 2^135078689 is an apocalyptic number.

It is an amenable number.

135078689 is a deficient number, since it is larger than the sum of its proper divisors (2183911).

135078689 is an equidigital number, since it uses as much as digits as its factorization.

135078689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 135078689 is about 11622.3357807284. The cubic root of 135078689 is about 513.0924359751.

The spelling of 135078689 in words is "one hundred thirty-five million, seventy-eight thousand, six hundred eighty-nine".