199621068 has 48 divisors (see below), whose sum is σ = 503569920. Its totient is φ = 61331904.

The previous prime is 199621043. The next prime is 199621069. The reversal of 199621068 is 860126991.

199621068 = T₄₁₇ + T₄₁₈ + ... + T₁₀₈₂.

It is not an unprimeable number, because it can be changed into a prime (199621069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3396 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (10491040).

Almost surely, 2^199621068 is an apocalyptic number.

It is an amenable number.

199621068 is an abundant number, since it is smaller than the sum of its proper divisors (303948852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199621068 is a wasteful number, since it uses less digits than its factorization.

199621068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23726 (or 23724 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 199621068 is about 14128.7320025542. The cubic root of 199621068 is about 584.4339795124.

The spelling of 199621068 in words is "one hundred ninety-nine million, six hundred twenty-one thousand, sixty-eight".