135679989 has 8 divisors (see below), whose sum is σ = 181050912. Its totient is φ = 90381200.

The previous prime is 135679987. The next prime is 135680003. The reversal of 135679989 is 989976531.

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 135679989 - 2¹ = 135679987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135679987) 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, 13479 + ... + 21284.

It is an arithmetic number, because the mean of its divisors is an integer number (22631364).

Almost surely, 2^135679989 is an apocalyptic number.

It is an amenable number.

135679989 is a deficient number, since it is larger than the sum of its proper divisors (45370923).

135679989 is a wasteful number, since it uses less digits than its factorization.

135679989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36067.

The product of its digits is 3674160, while the sum is 57.

The square root of 135679989 is about 11648.1753506719. The cubic root of 135679989 is about 513.8526491984.

The spelling of 135679989 in words is "one hundred thirty-five million, six hundred seventy-nine thousand, nine hundred eighty-nine".