189609983999 has 4 divisors (see below), whose sum is σ = 190032278400. Its totient is φ = 189187689600.

The previous prime is 189609983989. The next prime is 189609984029. The reversal of 189609983999 is 999389906981.

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 189609983999 - 2³² = 185315016703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189609983929) 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, 211146527 + ... + 211147424.

It is an arithmetic number, because the mean of its divisors is an integer number (47508069600).

Almost surely, 2^189609983999 is an apocalyptic number.

189609983999 is a deficient number, since it is larger than the sum of its proper divisors (422294401).

189609983999 is an equidigital number, since it uses as much as digits as its factorization.

189609983999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422294400.

The product of its (nonzero) digits is 612220032, while the sum is 80.

The spelling of 189609983999 in words is "one hundred eighty-nine billion, six hundred nine million, nine hundred eighty-three thousand, nine hundred ninety-nine".