994252813 has 4 divisors (see below), whose sum is σ = 1004502940. Its totient is φ = 984002688.

The previous prime is 994252799. The next prime is 994252823. The reversal of 994252813 is 318252499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318252499 = 3907 ⋅81457.

It can be written as a sum of positive squares in 2 ways, for example, as 266440329 + 727812484 = 16323^2 + 26978^2 .

It is a cyclic number.

It is not a de Polignac number, because 994252813 - 2¹⁷ = 994121741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 994252813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994252823) 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 in 3 ways as a sum of consecutive naturals, for example, 5124918 + ... + 5125111.

It is an arithmetic number, because the mean of its divisors is an integer number (251125735).

Almost surely, 2^994252813 is an apocalyptic number.

It is an amenable number.

994252813 is a deficient number, since it is larger than the sum of its proper divisors (10250127).

994252813 is a wasteful number, since it uses less digits than its factorization.

994252813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250126.

The product of its digits is 155520, while the sum is 43.

The square root of 994252813 is about 31531.7746566856. The cubic root of 994252813 is about 998.0805892194.

The spelling of 994252813 in words is "nine hundred ninety-four million, two hundred fifty-two thousand, eight hundred thirteen".