189189533 has 8 divisors (see below), whose sum is σ = 210768600. Its totient is φ = 168614208.

The previous prime is 189189529. The next prime is 189189569. The reversal of 189189533 is 335981981.

It can be written as a sum of positive squares in 4 ways, for example, as 38464804 + 150724729 = 6202^2 + 12277^2 .

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 189189533 - 2² = 189189529 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 (189189503) 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, 250538 + ... + 251291.

It is an arithmetic number, because the mean of its divisors is an integer number (26346075).

Almost surely, 2^189189533 is an apocalyptic number.

189189533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

189189533 is a deficient number, since it is larger than the sum of its proper divisors (21579067).

189189533 is a wasteful number, since it uses less digits than its factorization.

189189533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501871.

The product of its digits is 233280, while the sum is 47.

The square root of 189189533 is about 13754.6186061265. The cubic root of 189189533 is about 574.0711233280.

The spelling of 189189533 in words is "one hundred eighty-nine million, one hundred eighty-nine thousand, five hundred thirty-three".