198043437 has 8 divisors (see below), whose sum is σ = 265154560. Its totient is φ = 131480640.

The previous prime is 198043399. The next prime is 198043451. The reversal of 198043437 is 734340891.

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

It is not a de Polignac number, because 198043437 - 2¹⁰ = 198042413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198043395 and 198043404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198043537) 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, 136237 + ... + 137682.

It is an arithmetic number, because the mean of its divisors is an integer number (33144320).

Almost surely, 2^198043437 is an apocalyptic number.

It is an amenable number.

198043437 is a deficient number, since it is larger than the sum of its proper divisors (67111123).

198043437 is a wasteful number, since it uses less digits than its factorization.

198043437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274163.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 198043437 is about 14072.7906614147. The cubic root of 198043437 is about 582.8902866804.

The spelling of 198043437 in words is "one hundred ninety-eight million, forty-three thousand, four hundred thirty-seven".