198869087 has 4 divisors (see below), whose sum is σ = 198908040. Its totient is φ = 198830136.

The previous prime is 198869081. The next prime is 198869113. The reversal of 198869087 is 780968891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198869087 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 (198869081) 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, 10412 + ... + 22497.

It is an arithmetic number, because the mean of its divisors is an integer number (49727010).

Almost surely, 2^198869087 is an apocalyptic number.

198869087 is a deficient number, since it is larger than the sum of its proper divisors (38953).

198869087 is an equidigital number, since it uses as much as digits as its factorization.

198869087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38952.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 198869087 is about 14102.0951280297. The cubic root of 198869087 is about 583.6991935815.

The spelling of 198869087 in words is "one hundred ninety-eight million, eight hundred sixty-nine thousand, eighty-seven".