199213057 has 2 divisors, whose sum is σ = 199213058. Its totient is φ = 199213056.

The previous prime is 199213019. The next prime is 199213067. The reversal of 199213057 is 750312991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150896656 + 48316401 = 12284^2 + 6951^2 .

It is an emirp because it is prime and its reverse (750312991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199213057 - 2¹¹ = 199211009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199213067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99606528 + 99606529.

It is an arithmetic number, because the mean of its divisors is an integer number (99606529).

It is a Proth number, since it is equal to 12159 ⋅ 2¹⁴ + 1 and 12159 < 2¹⁴.

Almost surely, 2^199213057 is an apocalyptic number.

It is an amenable number.

199213057 is a deficient number, since it is larger than the sum of its proper divisors (1).

199213057 is an equidigital number, since it uses as much as digits as its factorization.

199213057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 199213057 is about 14114.2855646327. The cubic root of 199213057 is about 584.0355276832.

The spelling of 199213057 in words is "one hundred ninety-nine million, two hundred thirteen thousand, fifty-seven".