189717329 has 4 divisors (see below), whose sum is σ = 189748020. Its totient is φ = 189686640.

The previous prime is 189717323. The next prime is 189717383. The reversal of 189717329 is 923717981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6385729 + 183331600 = 2527^2 + 13540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189717329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189717323) 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, 2474 + ... + 19635.

It is an arithmetic number, because the mean of its divisors is an integer number (47437005).

Almost surely, 2^189717329 is an apocalyptic number.

It is an amenable number.

189717329 is a deficient number, since it is larger than the sum of its proper divisors (30691).

189717329 is an equidigital number, since it uses as much as digits as its factorization.

189717329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30690.

The product of its digits is 190512, while the sum is 47.

The square root of 189717329 is about 13773.7913807346. The cubic root of 189717329 is about 574.6044705197.

The spelling of 189717329 in words is "one hundred eighty-nine million, seven hundred seventeen thousand, three hundred twenty-nine".