7985771 has 2 divisors, whose sum is σ = 7985772. Its totient is φ = 7985770.

The previous prime is 7985749. The next prime is 7985777. The reversal of 7985771 is 1775897.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7985771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7985777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992885 + 3992886.

It is an arithmetic number, because the mean of its divisors is an integer number (3992886).

Almost surely, 2^7985771 is an apocalyptic number.

7985771 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985771 is an equidigital number, since it uses as much as digits as its factorization.

7985771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 44.

The square root of 7985771 is about 2825.9106496845. The cubic root of 7985771 is about 199.8813546303.

The spelling of 7985771 in words is "seven million, nine hundred eighty-five thousand, seven hundred seventy-one".