199995955 has 8 divisors (see below), whose sum is σ = 240353712. Its totient is φ = 159757728.

The previous prime is 199995953. The next prime is 199995959. The reversal of 199995955 is 559599991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199995955 - 2¹ = 199995953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199995893 and 199995902.

It is not an unprimeable number, because it can be changed into a prime (199995953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26157 + ... + 32926.

It is an arithmetic number, because the mean of its divisors is an integer number (30044214).

Almost surely, 2^199995955 is an apocalyptic number.

199995955 is a deficient number, since it is larger than the sum of its proper divisors (40357757).

199995955 is an equidigital number, since it uses as much as digits as its factorization.

199995955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59765.

The product of its digits is 7381125, while the sum is 61.

The square root of 199995955 is about 14141.9926106613. The cubic root of 199995955 is about 584.7996050654.

The spelling of 199995955 in words is "one hundred ninety-nine million, nine hundred ninety-five thousand, nine hundred fifty-five".