199426613 has 2 divisors, whose sum is σ = 199426614. Its totient is φ = 199426612.

The previous prime is 199426607. The next prime is 199426631. The reversal of 199426613 is 316624991.

Together with next prime (199426631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155575729 + 43850884 = 12473^2 + 6622^2 .

It is an emirp because it is prime and its reverse (316624991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199426613 - 2¹⁶ = 199361077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199426663) 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, 99713306 + 99713307.

It is an arithmetic number, because the mean of its divisors is an integer number (99713307).

Almost surely, 2^199426613 is an apocalyptic number.

It is an amenable number.

199426613 is a deficient number, since it is larger than the sum of its proper divisors (1).

199426613 is an equidigital number, since it uses as much as digits as its factorization.

199426613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 199426613 is about 14121.8487812326. The cubic root of 199426613 is about 584.2441481279.

The spelling of 199426613 in words is "one hundred ninety-nine million, four hundred twenty-six thousand, six hundred thirteen".