199080305 has 4 divisors (see below), whose sum is σ = 238896372. Its totient is φ = 159264240.

The previous prime is 199080293. The next prime is 199080361. The reversal of 199080305 is 503080991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109077136 + 90003169 = 10444^2 + 9487^2 .

It is not a de Polignac number, because 199080305 - 2⁴ = 199080289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19908026 + ... + 19908035.

It is an arithmetic number, because the mean of its divisors is an integer number (59724093).

Almost surely, 2^199080305 is an apocalyptic number.

It is an amenable number.

199080305 is a deficient number, since it is larger than the sum of its proper divisors (39816067).

199080305 is an equidigital number, since it uses as much as digits as its factorization.

199080305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39816066.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 199080305 is about 14109.5820278278. The cubic root of 199080305 is about 583.9057685970.

The spelling of 199080305 in words is "one hundred ninety-nine million, eighty thousand, three hundred five".