198321377 has 4 divisors (see below), whose sum is σ = 198350256. Its totient is φ = 198292500.

The previous prime is 198321329. The next prime is 198321379. The reversal of 198321377 is 773123891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 773123891 = 11743 ⋅65837.

It is a cyclic number.

It is not a de Polignac number, because 198321377 - 2⁶ = 198321313 is a prime.

It is a super-2 number, since 2×198321377² = 78662737150352258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198321379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2438 + ... + 20064.

It is an arithmetic number, because the mean of its divisors is an integer number (49587564).

Almost surely, 2^198321377 is an apocalyptic number.

It is an amenable number.

198321377 is a deficient number, since it is larger than the sum of its proper divisors (28879).

198321377 is a wasteful number, since it uses less digits than its factorization.

198321377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28878.

The product of its digits is 63504, while the sum is 41.

The square root of 198321377 is about 14082.6622838155. The cubic root of 198321377 is about 583.1628410227.

The spelling of 198321377 in words is "one hundred ninety-eight million, three hundred twenty-one thousand, three hundred seventy-seven".