198115387 has 4 divisors (see below), whose sum is σ = 202330656. Its totient is φ = 193900120.

The previous prime is 198115367. The next prime is 198115429. The reversal of 198115387 is 783511891.

198115387 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: 783511891 = 727 ⋅1077733.

It is a cyclic number.

It is not a de Polignac number, because 198115387 - 2⁷ = 198115259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198115367) 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, 2107564 + ... + 2107657.

It is an arithmetic number, because the mean of its divisors is an integer number (50582664).

Almost surely, 2^198115387 is an apocalyptic number.

198115387 is a deficient number, since it is larger than the sum of its proper divisors (4215269).

198115387 is an equidigital number, since it uses as much as digits as its factorization.

198115387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215268.

The product of its digits is 60480, while the sum is 43.

The square root of 198115387 is about 14075.3467808079. The cubic root of 198115387 is about 582.9608669513.

The spelling of 198115387 in words is "one hundred ninety-eight million, one hundred fifteen thousand, three hundred eighty-seven".