199775438 has 4 divisors (see below), whose sum is σ = 299663160. Its totient is φ = 99887718.

The previous prime is 199775419. The next prime is 199775453. The reversal of 199775438 is 834577991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 199775438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49943858 + ... + 49943861.

It is an arithmetic number, because the mean of its divisors is an integer number (74915790).

Almost surely, 2^199775438 is an apocalyptic number.

199775438 is a deficient number, since it is larger than the sum of its proper divisors (99887722).

199775438 is an equidigital number, since it uses as much as digits as its factorization.

199775438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99887721.

The product of its digits is 1905120, while the sum is 53.

The square root of 199775438 is about 14134.1939282012. The cubic root of 199775438 is about 584.5845912495.

The spelling of 199775438 in words is "one hundred ninety-nine million, seven hundred seventy-five thousand, four hundred thirty-eight".