198992429 has 8 divisors (see below), whose sum is σ = 210931128. Its totient is φ = 187079680.

The previous prime is 198992419. The next prime is 198992447. The reversal of 198992429 is 924299891.

It can be written as a sum of positive squares in 4 ways, for example, as 159012100 + 39980329 = 12610^2 + 6323^2 .

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-198992429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198992419) 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, 10619 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (26366391).

Almost surely, 2^198992429 is an apocalyptic number.

It is an amenable number.

198992429 is a deficient number, since it is larger than the sum of its proper divisors (11938699).

198992429 is a wasteful number, since it uses less digits than its factorization.

198992429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975.

The product of its digits is 839808, while the sum is 53.

The square root of 198992429 is about 14106.4676301333. The cubic root of 198992429 is about 583.8198420410.

The spelling of 198992429 in words is "one hundred ninety-eight million, nine hundred ninety-two thousand, four hundred twenty-nine".