199738057 has 2 divisors, whose sum is σ = 199738058. Its totient is φ = 199738056.

The previous prime is 199738043. The next prime is 199738061. The reversal of 199738057 is 750837991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170459136 + 29278921 = 13056^2 + 5411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199738057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199738057.

It is not a weakly prime, because it can be changed into another prime (199738067) 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, 99869028 + 99869029.

It is an arithmetic number, because the mean of its divisors is an integer number (99869029).

Almost surely, 2^199738057 is an apocalyptic number.

It is an amenable number.

199738057 is a deficient number, since it is larger than the sum of its proper divisors (1).

199738057 is an equidigital number, since it uses as much as digits as its factorization.

199738057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 199738057 is about 14132.8715058193. The cubic root of 199738057 is about 584.5481274414.

The spelling of 199738057 in words is "one hundred ninety-nine million, seven hundred thirty-eight thousand, fifty-seven".