7967021 has 2 divisors, whose sum is σ = 7967022. Its totient is φ = 7967020.

The previous prime is 7967009. The next prime is 7967041. The reversal of 7967021 is 1207697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7590025 + 376996 = 2755^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 7967021 - 2¹⁸ = 7704877 is a prime.

It is a super-2 number, since 2×7967021² = 126946847228882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7967041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3983510 + 3983511.

It is an arithmetic number, because the mean of its divisors is an integer number (3983511).

Almost surely, 2^7967021 is an apocalyptic number.

It is an amenable number.

7967021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7967021 is an equidigital number, since it uses as much as digits as its factorization.

7967021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 7967021 is about 2822.5911854181. The cubic root of 7967021 is about 199.7247964888.

The spelling of 7967021 in words is "seven million, nine hundred sixty-seven thousand, twenty-one".