198641399 has 8 divisors (see below), whose sum is σ = 219934848. Its totient is φ = 177887160.

The previous prime is 198641321. The next prime is 198641407. The reversal of 198641399 is 993146891.

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

It is a de Polignac number, because none of the positive numbers 2^k-198641399 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 (198643399) 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, 134027 + ... + 135500.

It is an arithmetic number, because the mean of its divisors is an integer number (27491856).

Almost surely, 2^198641399 is an apocalyptic number.

198641399 is a deficient number, since it is larger than the sum of its proper divisors (21293449).

198641399 is a wasteful number, since it uses less digits than its factorization.

198641399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269605.

The product of its digits is 419904, while the sum is 50.

The square root of 198641399 is about 14094.0199730240. The cubic root of 198641399 is about 583.4763467220.

The spelling of 198641399 in words is "one hundred ninety-eight million, six hundred forty-one thousand, three hundred ninety-nine".