199738043 has 2 divisors, whose sum is σ = 199738044. Its totient is φ = 199738042.

The previous prime is 199737997. The next prime is 199738057. The reversal of 199738043 is 340837991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199738043 - 2¹⁶ = 199672507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199737985 and 199738003.

It is not a weakly prime, because it can be changed into another prime (199738073) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99869021 + 99869022.

It is an arithmetic number, because the mean of its divisors is an integer number (99869022).

Almost surely, 2^199738043 is an apocalyptic number.

199738043 is a deficient number, since it is larger than the sum of its proper divisors (1).

199738043 is an equidigital number, since it uses as much as digits as its factorization.

199738043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 199738043 is about 14132.8710105201. The cubic root of 199738043 is about 584.5481137841.

The spelling of 199738043 in words is "one hundred ninety-nine million, seven hundred thirty-eight thousand, forty-three".