189789539 has 8 divisors (see below), whose sum is σ = 196121040. Its totient is φ = 183521376.

The previous prime is 189789511. The next prime is 189789553. The reversal of 189789539 is 935987981.

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 189789539 - 2⁸ = 189789283 is a prime.

It is a super-2 number, since 2×189789539² = 72040138227665042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189789559) 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, 9704 + ... + 21765.

It is an arithmetic number, because the mean of its divisors is an integer number (24515130).

Almost surely, 2^189789539 is an apocalyptic number.

189789539 is a deficient number, since it is larger than the sum of its proper divisors (6331501).

189789539 is a wasteful number, since it uses less digits than its factorization.

189789539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31669.

The product of its digits is 4898880, while the sum is 59.

The square root of 189789539 is about 13776.4124139777. The cubic root of 189789539 is about 574.6773630451.

The spelling of 189789539 in words is "one hundred eighty-nine million, seven hundred eighty-nine thousand, five hundred thirty-nine".