189906539 has 8 divisors (see below), whose sum is σ = 200051280. Its totient is φ = 179776800.

The previous prime is 189906517. The next prime is 189906551. The reversal of 189906539 is 935609981.

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 189906539 - 2¹² = 189902443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189206539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30209 + ... + 35949.

It is an arithmetic number, because the mean of its divisors is an integer number (25006410).

Almost surely, 2^189906539 is an apocalyptic number.

189906539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189906539 is a deficient number, since it is larger than the sum of its proper divisors (10144741).

189906539 is a wasteful number, since it uses less digits than its factorization.

189906539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7501.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 189906539 is about 13780.6581482889. The cubic root of 189906539 is about 574.7954296852.

The spelling of 189906539 in words is "one hundred eighty-nine million, nine hundred six thousand, five hundred thirty-nine".