133865389 has 8 divisors (see below), whose sum is σ = 153586368. Its totient is φ = 114293760.

The previous prime is 133865387. The next prime is 133865399. The reversal of 133865389 is 983568331.

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

It is not a de Polignac number, because 133865389 - 2¹ = 133865387 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 (133865383) 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, 35407 + ... + 39004.

It is an arithmetic number, because the mean of its divisors is an integer number (19198296).

Almost surely, 2^133865389 is an apocalyptic number.

It is an amenable number.

133865389 is a deficient number, since it is larger than the sum of its proper divisors (19720979).

133865389 is an equidigital number, since it uses as much as digits as its factorization.

133865389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74675.

The product of its digits is 466560, while the sum is 46.

The square root of 133865389 is about 11570.0211322192. The cubic root of 133865389 is about 511.5515851818.

The spelling of 133865389 in words is "one hundred thirty-three million, eight hundred sixty-five thousand, three hundred eighty-nine".