189885729 has 8 divisors (see below), whose sum is σ = 276197472. Its totient is φ = 115082240.

The previous prime is 189885713. The next prime is 189885793. The reversal of 189885729 is 927588981.

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 189885729 - 2⁴ = 189885713 is a prime.

It is a super-2 number, since 2×189885729² = 72113180155722882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189885229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2877024 + ... + 2877089.

It is an arithmetic number, because the mean of its divisors is an integer number (34524684).

Almost surely, 2^189885729 is an apocalyptic number.

It is an amenable number.

189885729 is a deficient number, since it is larger than the sum of its proper divisors (86311743).

189885729 is a wasteful number, since it uses less digits than its factorization.

189885729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5754127.

The product of its digits is 2903040, while the sum is 57.

The square root of 189885729 is about 13779.9030838392. The cubic root of 189885729 is about 574.7744335154.

The spelling of 189885729 in words is "one hundred eighty-nine million, eight hundred eighty-five thousand, seven hundred twenty-nine".