133539989 has 8 divisors (see below), whose sum is σ = 146308032. Its totient is φ = 120876640.

The previous prime is 133539953. The next prime is 133540003. The reversal of 133539989 is 989935331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133539989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133539929) 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, 23489 + ... + 28614.

It is an arithmetic number, because the mean of its divisors is an integer number (18288504).

Almost surely, 2^133539989 is an apocalyptic number.

It is an amenable number.

133539989 is a deficient number, since it is larger than the sum of its proper divisors (12768043).

133539989 is a wasteful number, since it uses less digits than its factorization.

133539989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52347.

The product of its digits is 787320, while the sum is 50.

The square root of 133539989 is about 11555.9503719945. The cubic root of 133539989 is about 511.1367556639.

The spelling of 133539989 in words is "one hundred thirty-three million, five hundred thirty-nine thousand, nine hundred eighty-nine".