994217842913 has 2 divisors, whose sum is σ = 994217842914. Its totient is φ = 994217842912.

The previous prime is 994217842883. The next prime is 994217842927. The reversal of 994217842913 is 319248712499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578098667584 + 416119175329 = 760328^2 + 645073^2 .

It is an emirp because it is prime and its reverse (319248712499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994217842913 - 2²² = 994213648609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (994217842963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497108921456 + 497108921457.

It is an arithmetic number, because the mean of its divisors is an integer number (497108921457).

Almost surely, 2^994217842913 is an apocalyptic number.

It is an amenable number.

994217842913 is a deficient number, since it is larger than the sum of its proper divisors (1).

994217842913 is an equidigital number, since it uses as much as digits as its factorization.

994217842913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 59.

The spelling of 994217842913 in words is "nine hundred ninety-four billion, two hundred seventeen million, eight hundred forty-two thousand, nine hundred thirteen".