199344557 has 2 divisors, whose sum is σ = 199344558. Its totient is φ = 199344556.

The previous prime is 199344479. The next prime is 199344559. The reversal of 199344557 is 755443991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113763556 + 85581001 = 10666^2 + 9251^2 .

It is a cyclic number.

It is not a de Polignac number, because 199344557 - 2¹⁰ = 199343533 is a prime.

Together with 199344559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199344559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99672278 + 99672279.

It is an arithmetic number, because the mean of its divisors is an integer number (99672279).

Almost surely, 2^199344557 is an apocalyptic number.

It is an amenable number.

199344557 is a deficient number, since it is larger than the sum of its proper divisors (1).

199344557 is an equidigital number, since it uses as much as digits as its factorization.

199344557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 199344557 is about 14118.9431969960. The cubic root of 199344557 is about 584.1640061752.

The spelling of 199344557 in words is "one hundred ninety-nine million, three hundred forty-four thousand, five hundred fifty-seven".