189934039 has 4 divisors (see below), whose sum is σ = 193153320. Its totient is φ = 186714760.

The previous prime is 189934001. The next prime is 189934057. The reversal of 189934039 is 930439981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189934039 - 2²⁵ = 156379607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189934039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189934639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1609552 + ... + 1609669.

It is an arithmetic number, because the mean of its divisors is an integer number (48288330).

Almost surely, 2^189934039 is an apocalyptic number.

189934039 is a deficient number, since it is larger than the sum of its proper divisors (3219281).

189934039 is an equidigital number, since it uses as much as digits as its factorization.

189934039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219280.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 189934039 is about 13781.6558874469. The cubic root of 189934039 is about 574.8231733523.

It can be divided in two parts, 18993 and 4039, that added together give a palindrome (23032).

The spelling of 189934039 in words is "one hundred eighty-nine million, nine hundred thirty-four thousand, thirty-nine".