7985749 has 2 divisors, whose sum is σ = 7985750. Its totient is φ = 7985748.

The previous prime is 7985743. The next prime is 7985771. The reversal of 7985749 is 9475897.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7800849 + 184900 = 2793^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 7985749 - 2³ = 7985741 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 7⁵ + 9 + 8⁷ + 5⁵ + 7⁷ + 4⁹ + 9⁷ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992874 + 3992875.

It is an arithmetic number, because the mean of its divisors is an integer number (3992875).

Almost surely, 2^7985749 is an apocalyptic number.

It is an amenable number.

7985749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985749 is an equidigital number, since it uses as much as digits as its factorization.

7985749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 7985749 is about 2825.9067571312. The cubic root of 7985749 is about 199.8811710791.

The spelling of 7985749 in words is "seven million, nine hundred eighty-five thousand, seven hundred forty-nine".