198381377 has 4 divisors (see below), whose sum is σ = 198415236. Its totient is φ = 198347520.

The previous prime is 198381367. The next prime is 198381389. The reversal of 198381377 is 773183891.

198381377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773183891 = 19 ⋅40693889.

It can be written as a sum of positive squares in 2 ways, for example, as 143976001 + 54405376 = 11999^2 + 7376^2 .

It is a cyclic number.

It is not a de Polignac number, because 198381377 - 2¹⁰ = 198380353 is a prime.

It is a super-2 number, since 2×198381377² = 78710341480832258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198381367) 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, 5624 + ... + 20697.

It is an arithmetic number, because the mean of its divisors is an integer number (49603809).

Almost surely, 2^198381377 is an apocalyptic number.

It is an amenable number.

198381377 is a deficient number, since it is larger than the sum of its proper divisors (33859).

198381377 is an equidigital number, since it uses as much as digits as its factorization.

198381377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33858.

The product of its digits is 254016, while the sum is 47.

The square root of 198381377 is about 14084.7924017360. The cubic root of 198381377 is about 583.2216449751.

The spelling of 198381377 in words is "one hundred ninety-eight million, three hundred eighty-one thousand, three hundred seventy-seven".