199868126 has 4 divisors (see below), whose sum is σ = 299802192. Its totient is φ = 99934062.

The previous prime is 199868113. The next prime is 199868131. The reversal of 199868126 is 621868991.

It is a happy number.

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

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, 49967030 + ... + 49967033.

It is an arithmetic number, because the mean of its divisors is an integer number (74950548).

Almost surely, 2^199868126 is an apocalyptic number.

199868126 is a deficient number, since it is larger than the sum of its proper divisors (99934066).

199868126 is an equidigital number, since it uses as much as digits as its factorization.

199868126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99934065.

The product of its digits is 373248, while the sum is 50.

The square root of 199868126 is about 14137.4724049244. The cubic root of 199868126 is about 584.6749854100.

The spelling of 199868126 in words is "one hundred ninety-nine million, eight hundred sixty-eight thousand, one hundred twenty-six".