198063997 has 16 divisors (see below), whose sum is σ = 211725360. Its totient is φ = 184923648.

The previous prime is 198063973. The next prime is 198064033. The reversal of 198063997 is 799360891.

It can be written as a sum of positive squares in 8 ways, for example, as 15570916 + 182493081 = 3946^2 + 13509^2 .

It is a cyclic number.

It is not a de Polignac number, because 198063997 - 2²⁷ = 63846269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198063947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210913 + ... + 211849.

It is an arithmetic number, because the mean of its divisors is an integer number (13232835).

Almost surely, 2^198063997 is an apocalyptic number.

It is an amenable number.

198063997 is a deficient number, since it is larger than the sum of its proper divisors (13661363).

198063997 is a wasteful number, since it uses less digits than its factorization.

198063997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 198063997 is about 14073.5211301223. The cubic root of 198063997 is about 582.9104570191.

The spelling of 198063997 in words is "one hundred ninety-eight million, sixty-three thousand, nine hundred ninety-seven".