198214729 has 8 divisors (see below), whose sum is σ = 199701320. Its totient is φ = 196732800.

The previous prime is 198214717. The next prime is 198214763. The reversal of 198214729 is 927412891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22705225 + 175509504 = 4765^2 + 13248^2 .

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 198214729 - 2¹¹ = 198212681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198214789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149389 + ... + 150709.

It is an arithmetic number, because the mean of its divisors is an integer number (24962665).

Almost surely, 2^198214729 is an apocalyptic number.

It is an amenable number.

198214729 is a deficient number, since it is larger than the sum of its proper divisors (1486591).

198214729 is a wasteful number, since it uses less digits than its factorization.

198214729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331.

The product of its digits is 72576, while the sum is 43.

The square root of 198214729 is about 14078.8752746801. The cubic root of 198214729 is about 583.0582896742.

The spelling of 198214729 in words is "one hundred ninety-eight million, two hundred fourteen thousand, seven hundred twenty-nine".