199156913 has 2 divisors, whose sum is σ = 199156914. Its totient is φ = 199156912.

The previous prime is 199156901. The next prime is 199156933. The reversal of 199156913 is 319651991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179238544 + 19918369 = 13388^2 + 4463^2 .

It is a cyclic number.

It is not a de Polignac number, because 199156913 - 2¹⁰ = 199155889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199156933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99578456 + 99578457.

It is an arithmetic number, because the mean of its divisors is an integer number (99578457).

Almost surely, 2^199156913 is an apocalyptic number.

It is an amenable number.

199156913 is a deficient number, since it is larger than the sum of its proper divisors (1).

199156913 is an equidigital number, since it uses as much as digits as its factorization.

199156913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 44.

The square root of 199156913 is about 14112.2965175764. The cubic root of 199156913 is about 583.9806564948.

The spelling of 199156913 in words is "one hundred ninety-nine million, one hundred fifty-six thousand, nine hundred thirteen".