199217653 has 2 divisors, whose sum is σ = 199217654. Its totient is φ = 199217652.

The previous prime is 199217639. The next prime is 199217663. The reversal of 199217653 is 356712991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173238244 + 25979409 = 13162^2 + 5097^2 .

It is an emirp because it is prime and its reverse (356712991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199217653 - 2¹⁷ = 199086581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199217633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99608826 + 99608827.

It is an arithmetic number, because the mean of its divisors is an integer number (99608827).

Almost surely, 2^199217653 is an apocalyptic number.

It is an amenable number.

199217653 is a deficient number, since it is larger than the sum of its proper divisors (1).

199217653 is an equidigital number, since it uses as much as digits as its factorization.

199217653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 43.

The square root of 199217653 is about 14114.4483774606. The cubic root of 199217653 is about 584.0400190331.

The spelling of 199217653 in words is "one hundred ninety-nine million, two hundred seventeen thousand, six hundred fifty-three".