199438775 has 6 divisors (see below), whose sum is σ = 247304112. Its totient is φ = 159551000.

The previous prime is 199438751. The next prime is 199438783. The reversal of 199438775 is 577834991.

It is not a de Polignac number, because 199438775 - 2⁶ = 199438711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3988751 + ... + 3988800.

It is an arithmetic number, because the mean of its divisors is an integer number (41217352).

Almost surely, 2^199438775 is an apocalyptic number.

199438775 is a deficient number, since it is larger than the sum of its proper divisors (47865337).

199438775 is an equidigital number, since it uses as much as digits as its factorization.

199438775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977561 (or 7977556 counting only the distinct ones).

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

The square root of 199438775 is about 14122.2793840088. The cubic root of 199438775 is about 584.2560245650.

The spelling of 199438775 in words is "one hundred ninety-nine million, four hundred thirty-eight thousand, seven hundred seventy-five".