198974247 has 4 divisors (see below), whose sum is σ = 265299000. Its totient is φ = 132649496.

The previous prime is 198974231. The next prime is 198974261. The reversal of 198974247 is 742479891.

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 198974247 - 2⁴ = 198974231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198974247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198974227) 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, 33162372 + ... + 33162377.

It is an arithmetic number, because the mean of its divisors is an integer number (66324750).

Almost surely, 2^198974247 is an apocalyptic number.

198974247 is a deficient number, since it is larger than the sum of its proper divisors (66324753).

198974247 is an equidigital number, since it uses as much as digits as its factorization.

198974247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66324752.

The product of its digits is 1016064, while the sum is 51.

The square root of 198974247 is about 14105.8231592488. The cubic root of 198974247 is about 583.8020602327.

The spelling of 198974247 in words is "one hundred ninety-eight million, nine hundred seventy-four thousand, two hundred forty-seven".