133889509 has 8 divisors (see below), whose sum is σ = 150458112. Its totient is φ = 118216560.

The previous prime is 133889507. The next prime is 133889551. The reversal of 133889509 is 905988331.

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 133889509 - 2¹ = 133889507 is a prime.

It is a super-2 number, since 2×133889509² = 35852801240522162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133889507) 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, 223597 + ... + 224194.

It is an arithmetic number, because the mean of its divisors is an integer number (18807264).

Almost surely, 2^133889509 is an apocalyptic number.

It is an amenable number.

133889509 is a deficient number, since it is larger than the sum of its proper divisors (16568603).

133889509 is a wasteful number, since it uses less digits than its factorization.

133889509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447827.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 133889509 is about 11571.0634342743. The cubic root of 133889509 is about 511.5823072958.

The spelling of 133889509 in words is "one hundred thirty-three million, eight hundred eighty-nine thousand, five hundred nine".