9992621 has 2 divisors, whose sum is σ = 9992622. Its totient is φ = 9992620.

The previous prime is 9992597. The next prime is 9992629. The reversal of 9992621 is 1262999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9523396 + 469225 = 3086^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9992621 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 (9992629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996310 + 4996311.

It is an arithmetic number, because the mean of its divisors is an integer number (4996311).

Almost surely, 2^9992621 is an apocalyptic number.

It is an amenable number.

9992621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9992621 is an equidigital number, since it uses as much as digits as its factorization.

9992621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 9992621 is about 3161.1107225151. The cubic root of 9992621 is about 215.3904640517.

The spelling of 9992621 in words is "nine million, nine hundred ninety-two thousand, six hundred twenty-one".