198399867241 has 9 divisors (see below), whose sum is σ = 199439083389. Its totient is φ = 197366045100.

The previous prime is 198399867229. The next prime is 198399867287. The reversal of 198399867241 is 142768993891.

It is a happy number.

The square root of 198399867241 is 445421.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 198399867241 - 2²⁹ = 197862996329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198399867641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 93982776 + ... + 93984886.

Almost surely, 2^198399867241 is an apocalyptic number.

198399867241 is the 445421-st square number.

198399867241 is the 222711-st centered octagonal number.

It is an amenable number.

198399867241 is a deficient number, since it is larger than the sum of its proper divisors (1039216148).

198399867241 is an frugal number, since it uses more digits than its factorization.

198399867241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644 (or 2322 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 67.

The spelling of 198399867241 in words is "one hundred ninety-eight billion, three hundred ninety-nine million, eight hundred sixty-seven thousand, two hundred forty-one".