199620026 has 4 divisors (see below), whose sum is σ = 299430042. Its totient is φ = 99810012.

The previous prime is 199620007. The next prime is 199620053. The reversal of 199620026 is 620026991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 620026991 = 521 ⋅1190071.

It can be written as a sum of positive squares in only one way, i.e., 189090001 + 10530025 = 13751^2 + 3245^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49905005 + ... + 49905008.

Almost surely, 2^199620026 is an apocalyptic number.

199620026 is a deficient number, since it is larger than the sum of its proper divisors (99810016).

199620026 is an equidigital number, since it uses as much as digits as its factorization.

199620026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99810015.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 199620026 is about 14128.6951272932. The cubic root of 199620026 is about 584.4329626169.

It can be divided in two parts, 1996 and 20026, that added together give a palindrome (22022).

The spelling of 199620026 in words is "one hundred ninety-nine million, six hundred twenty thousand, twenty-six".