189723988609 has 8 divisors (see below), whose sum is σ = 190131943680. Its totient is φ = 189316202400.

The previous prime is 189723988607. The next prime is 189723988631. The reversal of 189723988609 is 906889327981.

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 189723988609 - 2¹ = 189723988607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189723988607) 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, 2352252 + ... + 2431570.

It is an arithmetic number, because the mean of its divisors is an integer number (23766492960).

Almost surely, 2^189723988609 is an apocalyptic number.

It is an amenable number.

189723988609 is a deficient number, since it is larger than the sum of its proper divisors (407955071).

189723988609 is an equidigital number, since it uses as much as digits as its factorization.

189723988609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84431.

The product of its (nonzero) digits is 94058496, while the sum is 70.

The spelling of 189723988609 in words is "one hundred eighty-nine billion, seven hundred twenty-three million, nine hundred eighty-eight thousand, six hundred nine".