198929984129 has 8 divisors (see below), whose sum is σ = 201393569160. Its totient is φ = 196471475200.

The previous prime is 198929984119. The next prime is 198929984137. The reversal of 198929984129 is 921489929891.

It can be written as a sum of positive squares in 4 ways, for example, as 4179881104 + 194750103025 = 64652^2 + 441305^2 .

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-198929984129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198929984119) 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, 1190132 + ... + 1346949.

It is an arithmetic number, because the mean of its divisors is an integer number (25174196145).

Almost surely, 2^198929984129 is an apocalyptic number.

It is an amenable number.

198929984129 is a deficient number, since it is larger than the sum of its proper divisors (2463585031).

198929984129 is an equidigital number, since it uses as much as digits as its factorization.

198929984129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538051.

The product of its digits is 60466176, while the sum is 71.

The spelling of 198929984129 in words is "one hundred ninety-eight billion, nine hundred twenty-nine million, nine hundred eighty-four thousand, one hundred twenty-nine".