133969989 has 8 divisors (see below), whose sum is σ = 179659872. Its totient is φ = 88796720.

The previous prime is 133969987. The next prime is 133969993. The reversal of 133969989 is 989969331.

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 133969989 - 2¹ = 133969987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133969981) 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, 128547 + ... + 129584.

It is an arithmetic number, because the mean of its divisors is an integer number (22457484).

Almost surely, 2^133969989 is an apocalyptic number.

It is an amenable number.

133969989 is a deficient number, since it is larger than the sum of its proper divisors (45689883).

133969989 is a wasteful number, since it uses less digits than its factorization.

133969989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258307.

The product of its digits is 2834352, while the sum is 57.

The square root of 133969989 is about 11574.5405524366. The cubic root of 133969989 is about 511.6847895533.

The spelling of 133969989 in words is "one hundred thirty-three million, nine hundred sixty-nine thousand, nine hundred eighty-nine".