198915 has 16 divisors (see below), whose sum is σ = 324000. Its totient is φ = 104192.

The previous prime is 198901. The next prime is 198929. The reversal of 198915 is 519891.

198915 is nontrivially palindromic in base 16.

It is a Cunningham number, because it is equal to 446²-1.

It is an interprime number because it is at equal distance from previous prime (198901) and next prime (198929).

It is a cyclic number.

It is not a de Polignac number, because 198915 - 2⁴ = 198899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2¹⁹⁸⁹¹⁵ is an apocalyptic number.

198915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198915 is a deficient number, since it is larger than the sum of its proper divisors (125085).

198915 is a wasteful number, since it uses less digits than its factorization.

198915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246.

The product of its digits is 3240, while the sum is 33.

The square root of 198915 is about 445.9988789224. The cubic root of 198915 is about 58.3744109761.

The spelling of 198915 in words is "one hundred ninety-eight thousand, nine hundred fifteen".