198875869 has 4 divisors (see below), whose sum is σ = 209343040. Its totient is φ = 188408700.

The previous prime is 198875863. The next prime is 198875879. The reversal of 198875869 is 968578891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968578891 = 7 ⋅138368413.

It is a cyclic number.

It is not a de Polignac number, because 198875869 - 2⁵ = 198875837 is a prime.

It is a super-2 number, since 2×198875869² = 79103222541010322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198875863) 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, 5233557 + ... + 5233594.

It is an arithmetic number, because the mean of its divisors is an integer number (52335760).

Almost surely, 2^198875869 is an apocalyptic number.

198875869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198875869 is a deficient number, since it is larger than the sum of its proper divisors (10467171).

198875869 is a wasteful number, since it uses less digits than its factorization.

198875869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10467170.

The product of its digits is 8709120, while the sum is 61.

The square root of 198875869 is about 14102.3355867034. The cubic root of 198875869 is about 583.7058287721.

The spelling of 198875869 in words is "one hundred ninety-eight million, eight hundred seventy-five thousand, eight hundred sixty-nine".