199280938 has 4 divisors (see below), whose sum is σ = 298921410. Its totient is φ = 99640468.

The previous prime is 199280923. The next prime is 199281023. The reversal of 199280938 is 839082991.

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

It can be written as a sum of positive squares in only one way, i.e., 165559689 + 33721249 = 12867^2 + 5807^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 199280891 and 199280900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49820233 + ... + 49820236.

Almost surely, 2^199280938 is an apocalyptic number.

199280938 is a deficient number, since it is larger than the sum of its proper divisors (99640472).

199280938 is an equidigital number, since it uses as much as digits as its factorization.

199280938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99640471.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 199280938 is about 14116.6900511416. The cubic root of 199280938 is about 584.1018560222.

The spelling of 199280938 in words is "one hundred ninety-nine million, two hundred eighty thousand, nine hundred thirty-eight".