198694271 has 4 divisors (see below), whose sum is σ = 203315112. Its totient is φ = 194073432.

The previous prime is 198694261. The next prime is 198694273. The reversal of 198694271 is 172496891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198694271 - 2¹⁸ = 198432127 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 (198694273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310356 + ... + 2310441.

It is an arithmetic number, because the mean of its divisors is an integer number (50828778).

Almost surely, 2^198694271 is an apocalyptic number.

198694271 is a deficient number, since it is larger than the sum of its proper divisors (4620841).

198694271 is an equidigital number, since it uses as much as digits as its factorization.

198694271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620840.

The product of its digits is 217728, while the sum is 47.

The square root of 198694271 is about 14095.8955373541. The cubic root of 198694271 is about 583.5281097229.

The spelling of 198694271 in words is "one hundred ninety-eight million, six hundred ninety-four thousand, two hundred seventy-one".