198890995 has 8 divisors (see below), whose sum is σ = 238876416. Its totient is φ = 158974656.

The previous prime is 198890987. The next prime is 198891001. The reversal of 198890995 is 599098891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198890995 - 2³ = 198890987 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10707 + ... + 22636.

It is an arithmetic number, because the mean of its divisors is an integer number (29859552).

Almost surely, 2^198890995 is an apocalyptic number.

198890995 is a deficient number, since it is larger than the sum of its proper divisors (39985421).

198890995 is a wasteful number, since it uses less digits than its factorization.

198890995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34541.

The product of its (nonzero) digits is 2099520, while the sum is 58.

The square root of 198890995 is about 14102.8718706510. The cubic root of 198890995 is about 583.7206267976.

The spelling of 198890995 in words is "one hundred ninety-eight million, eight hundred ninety thousand, nine hundred ninety-five".