199976890 has 8 divisors (see below), whose sum is σ = 359958420. Its totient is φ = 79990752.

The previous prime is 199976879. The next prime is 199976893. The reversal of 199976890 is 98679991.

It can be written as a sum of positive squares in 2 ways, for example, as 191905609 + 8071281 = 13853^2 + 2841^2 .

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

It is not an unprimeable number, because it can be changed into a prime (199976893) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9998835 + ... + 9998854.

Almost surely, 2^199976890 is an apocalyptic number.

199976890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199976890 is a deficient number, since it is larger than the sum of its proper divisors (159981530).

199976890 is a wasteful number, since it uses less digits than its factorization.

199976890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997696.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 199976890 is about 14141.3185382411. The cubic root of 199976890 is about 584.7810220916.

The spelling of 199976890 in words is "one hundred ninety-nine million, nine hundred seventy-six thousand, eight hundred ninety".