199374818 has 4 divisors (see below), whose sum is σ = 299062230. Its totient is φ = 99687408.

The previous prime is 199374767. The next prime is 199374823. The reversal of 199374818 is 818473991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818473991 = 5779 ⋅141629.

It can be written as a sum of positive squares in only one way, i.e., 113571649 + 85803169 = 10657^2 + 9263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49843703 + ... + 49843706.

Almost surely, 2^199374818 is an apocalyptic number.

199374818 is a deficient number, since it is larger than the sum of its proper divisors (99687412).

199374818 is an equidigital number, since it uses as much as digits as its factorization.

199374818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99687411.

The product of its digits is 435456, while the sum is 50.

The square root of 199374818 is about 14120.0148016920. The cubic root of 199374818 is about 584.1935638630.

The spelling of 199374818 in words is "one hundred ninety-nine million, three hundred seventy-four thousand, eight hundred eighteen".