189179287889 has 8 divisors (see below), whose sum is σ = 195574468320. Its totient is φ = 182874819456.

The previous prime is 189179287883. The next prime is 189179287897. The reversal of 189179287889 is 988782971981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189179287889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189179287883) 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, 22673759 + ... + 22682100.

It is an arithmetic number, because the mean of its divisors is an integer number (24446808540).

Almost surely, 2^189179287889 is an apocalyptic number.

It is an amenable number.

189179287889 is a deficient number, since it is larger than the sum of its proper divisors (6395180431).

189179287889 is an equidigital number, since it uses as much as digits as its factorization.

189179287889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355999.

The product of its digits is 292626432, while the sum is 77.

The spelling of 189179287889 in words is "one hundred eighty-nine billion, one hundred seventy-nine million, two hundred eighty-seven thousand, eight hundred eighty-nine".