199452943 has 4 divisors (see below), whose sum is σ = 200647440. Its totient is φ = 198258448.

The previous prime is 199452931. The next prime is 199452947. The reversal of 199452943 is 349254991.

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

It is a cyclic number.

It is not a de Polignac number, because 199452943 - 2²¹ = 197355791 is a prime.

It is a super-2 number, since 2×199452943² = 79562952942722498, 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 = 199452893 and 199452902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199452947) 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, 596998 + ... + 597331.

It is an arithmetic number, because the mean of its divisors is an integer number (50161860).

Almost surely, 2^199452943 is an apocalyptic number.

199452943 is a deficient number, since it is larger than the sum of its proper divisors (1194497).

199452943 is a wasteful number, since it uses less digits than its factorization.

199452943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194496.

The product of its digits is 349920, while the sum is 46.

The square root of 199452943 is about 14122.7809938411. The cubic root of 199452943 is about 584.2698592925.

The spelling of 199452943 in words is "one hundred ninety-nine million, four hundred fifty-two thousand, nine hundred forty-three".