199438741 has 4 divisors (see below), whose sum is σ = 201413484. Its totient is φ = 197464000.

The previous prime is 199438721. The next prime is 199438751. The reversal of 199438741 is 147834991.

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 192626641 + 6812100 = 13879^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 199438741 - 2⁹ = 199438229 is a prime.

It is a super-2 number, since 2×199438741² = 79551622823330162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199438691 and 199438700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199438711) 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, 987220 + ... + 987421.

It is an arithmetic number, because the mean of its divisors is an integer number (50353371).

Almost surely, 2^199438741 is an apocalyptic number.

It is an amenable number.

199438741 is a deficient number, since it is larger than the sum of its proper divisors (1974743).

199438741 is a wasteful number, since it uses less digits than its factorization.

199438741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974742.

The product of its digits is 217728, while the sum is 46.

The square root of 199438741 is about 14122.2781802371. The cubic root of 199438741 is about 584.2559913640.

The spelling of 199438741 in words is "one hundred ninety-nine million, four hundred thirty-eight thousand, seven hundred forty-one".