9994813 has 2 divisors, whose sum is σ = 9994814. Its totient is φ = 9994812.

The previous prime is 9994807. The next prime is 9994837. The reversal of 9994813 is 3184999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9903609 + 91204 = 3147^2 + 302^2 .

It is an emirp because it is prime and its reverse (3184999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9994813 - 2²¹ = 7897661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9994813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9994613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997406 + 4997407.

It is an arithmetic number, because the mean of its divisors is an integer number (4997407).

Almost surely, 2^9994813 is an apocalyptic number.

It is an amenable number.

9994813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9994813 is an equidigital number, since it uses as much as digits as its factorization.

9994813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 9994813 is about 3161.4574170784. The cubic root of 9994813 is about 215.4062123850.

The spelling of 9994813 in words is "nine million, nine hundred ninety-four thousand, eight hundred thirteen".