7991017 has 2 divisors, whose sum is σ = 7991018. Its totient is φ = 7991016.

The previous prime is 7990999. The next prime is 7991033. The reversal of 7991017 is 7101997.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5248681 + 2742336 = 2291^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 7991017 - 2¹⁹ = 7466729 is a prime.

It is not a weakly prime, because it can be changed into another prime (7991047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995508 + 3995509.

It is an arithmetic number, because the mean of its divisors is an integer number (3995509).

Almost surely, 2^7991017 is an apocalyptic number.

It is an amenable number.

7991017 is a deficient number, since it is larger than the sum of its proper divisors (1).

7991017 is an equidigital number, since it uses as much as digits as its factorization.

7991017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 7991017 is about 2826.8386936647. The cubic root of 7991017 is about 199.9251136303.

The spelling of 7991017 in words is "seven million, nine hundred ninety-one thousand, seventeen".