199634117 has 4 divisors (see below), whose sum is σ = 199666476. Its totient is φ = 199601760.

The previous prime is 199634107. The next prime is 199634119. The reversal of 199634117 is 711436991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 198274561 + 1359556 = 14081^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 199634117 - 2⁶ = 199634053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199634119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734 + ... + 20327.

It is an arithmetic number, because the mean of its divisors is an integer number (49916619).

Almost surely, 2^199634117 is an apocalyptic number.

It is an amenable number.

199634117 is a deficient number, since it is larger than the sum of its proper divisors (32359).

199634117 is an equidigital number, since it uses as much as digits as its factorization.

199634117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32358.

The product of its digits is 40824, while the sum is 41.

The square root of 199634117 is about 14129.1937845016. The cubic root of 199634117 is about 584.4467138276.

The spelling of 199634117 in words is "one hundred ninety-nine million, six hundred thirty-four thousand, one hundred seventeen".