199452893 has 4 divisors (see below), whose sum is σ = 200309148. Its totient is φ = 198596640.

The previous prime is 199452889. The next prime is 199452931. The reversal of 199452893 is 398254991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398254991 = 19 ⋅20960789.

It can be written as a sum of positive squares in 2 ways, for example, as 60637369 + 138815524 = 7787^2 + 11782^2 .

It is a cyclic number.

It is not a de Polignac number, because 199452893 - 2² = 199452889 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 (199452793) 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 3 ways as a sum of consecutive naturals, for example, 427778 + ... + 428243.

It is an arithmetic number, because the mean of its divisors is an integer number (50077287).

Almost surely, 2^199452893 is an apocalyptic number.

It is an amenable number.

199452893 is a deficient number, since it is larger than the sum of its proper divisors (856255).

199452893 is an equidigital number, since it uses as much as digits as its factorization.

199452893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856254.

The product of its digits is 699840, while the sum is 50.

The square root of 199452893 is about 14122.7792236514. The cubic root of 199452893 is about 584.2698104698.

The spelling of 199452893 in words is "one hundred ninety-nine million, four hundred fifty-two thousand, eight hundred ninety-three".