992644813 has 2 divisors, whose sum is σ = 992644814. Its totient is φ = 992644812.

The previous prime is 992644789. The next prime is 992644819. The reversal of 992644813 is 318446299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 545829769 + 446815044 = 23363^2 + 21138^2 .

It is an emirp because it is prime and its reverse (318446299) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-992644813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992644819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496322406 + 496322407.

It is an arithmetic number, because the mean of its divisors is an integer number (496322407).

Almost surely, 2^992644813 is an apocalyptic number.

It is an amenable number.

992644813 is a deficient number, since it is larger than the sum of its proper divisors (1).

992644813 is an equidigital number, since it uses as much as digits as its factorization.

992644813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 992644813 is about 31506.2662497478. The cubic root of 992644813 is about 997.5422353417.

The spelling of 992644813 in words is "nine hundred ninety-two million, six hundred forty-four thousand, eight hundred thirteen".