199173043 has 2 divisors, whose sum is σ = 199173044. Its totient is φ = 199173042.

The previous prime is 199173019. The next prime is 199173059. The reversal of 199173043 is 340371991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199173043 - 2¹⁷ = 199041971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199172993 and 199173011.

It is not a weakly prime, because it can be changed into another prime (199173083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99586521 + 99586522.

It is an arithmetic number, because the mean of its divisors is an integer number (99586522).

Almost surely, 2^199173043 is an apocalyptic number.

199173043 is a deficient number, since it is larger than the sum of its proper divisors (1).

199173043 is an equidigital number, since it uses as much as digits as its factorization.

199173043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 199173043 is about 14112.8679934307. The cubic root of 199173043 is about 583.9964218756.

The spelling of 199173043 in words is "one hundred ninety-nine million, one hundred seventy-three thousand, forty-three".