199726955 has 16 divisors (see below), whose sum is σ = 260428800. Its totient is φ = 146486880.

The previous prime is 199726951. The next prime is 199727023. The reversal of 199726955 is 559627991.

It is a happy number.

It is not a de Polignac number, because 199726955 - 2² = 199726951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199726897 and 199726906.

It is not an unprimeable number, because it can be changed into a prime (199726951) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 30965 + ... + 36854.

It is an arithmetic number, because the mean of its divisors is an integer number (16276800).

Almost surely, 2^199726955 is an apocalyptic number.

199726955 is a deficient number, since it is larger than the sum of its proper divisors (60701845).

199726955 is a wasteful number, since it uses less digits than its factorization.

199726955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67874.

The product of its digits is 1530900, while the sum is 53.

The square root of 199726955 is about 14132.4787280930. The cubic root of 199726955 is about 584.5372969673.

The spelling of 199726955 in words is "one hundred ninety-nine million, seven hundred twenty-six thousand, nine hundred fifty-five".