7993021 has 2 divisors, whose sum is σ = 7993022. Its totient is φ = 7993020.

The previous prime is 7992973. The next prime is 7993057. The reversal of 7993021 is 1203997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6200100 + 1792921 = 2490^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 7993021 - 2¹³ = 7984829 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7993061) 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, 3996510 + 3996511.

It is an arithmetic number, because the mean of its divisors is an integer number (3996511).

Almost surely, 2^7993021 is an apocalyptic number.

It is an amenable number.

7993021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7993021 is an equidigital number, since it uses as much as digits as its factorization.

7993021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 7993021 is about 2827.1931310047. The cubic root of 7993021 is about 199.9418247465.

The spelling of 7993021 in words is "seven million, nine hundred ninety-three thousand, twenty-one".