199828890869 has 4 divisors (see below), whose sum is σ = 200183827296. Its totient is φ = 199473954444.

The previous prime is 199828890847. The next prime is 199828890907. The reversal of 199828890869 is 968098828991.

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.

It is a cyclic number.

It is not a de Polignac number, because 199828890869 - 2¹⁶ = 199828825333 is a prime.

It is a super-2 number, since 2×199828890869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199828890869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199828850869) 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, 177467369 + ... + 177468494.

It is an arithmetic number, because the mean of its divisors is an integer number (50045956824).

Almost surely, 2^199828890869 is an apocalyptic number.

It is an amenable number.

199828890869 is a deficient number, since it is larger than the sum of its proper divisors (354936427).

199828890869 is an equidigital number, since it uses as much as digits as its factorization.

199828890869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354936426.

The product of its (nonzero) digits is 322486272, while the sum is 77.

The spelling of 199828890869 in words is "one hundred ninety-nine billion, eight hundred twenty-eight million, eight hundred ninety thousand, eight hundred sixty-nine".