189879728099 has 8 divisors (see below), whose sum is σ = 198634356000. Its totient is φ = 181272236992.

The previous prime is 189879728083. The next prime is 189879728113. The reversal of 189879728099 is 990827978981.

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 189879728099 - 2⁴ = 189879728083 is a prime.

It is a super-2 number, since 2×189879728099² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189879728029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36781559 + ... + 36786720.

It is an arithmetic number, because the mean of its divisors is an integer number (24829294500).

Almost surely, 2^189879728099 is an apocalyptic number.

189879728099 is a deficient number, since it is larger than the sum of its proper divisors (8754627901).

189879728099 is an equidigital number, since it uses as much as digits as its factorization.

189879728099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73568397.

The product of its (nonzero) digits is 329204736, while the sum is 77.

The spelling of 189879728099 in words is "one hundred eighty-nine billion, eight hundred seventy-nine million, seven hundred twenty-eight thousand, ninety-nine".