7940673817 has 2 divisors, whose sum is σ = 7940673818. Its totient is φ = 7940673816.

The previous prime is 7940673799. The next prime is 7940673821. The reversal of 7940673817 is 7183760497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7756148761 + 184525056 = 88069^2 + 13584^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940673817 - 2¹¹ = 7940671769 is a prime.

It is not a weakly prime, because it can be changed into another prime (7940673317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970336908 + 3970336909.

It is an arithmetic number, because the mean of its divisors is an integer number (3970336909).

Almost surely, 2^7940673817 is an apocalyptic number.

It is an amenable number.

7940673817 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940673817 is an equidigital number, since it uses as much as digits as its factorization.

7940673817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 7940673817 is about 89110.4585163829. The cubic root of 7940673817 is about 1995.0438799987.

The spelling of 7940673817 in words is "seven billion, nine hundred forty million, six hundred seventy-three thousand, eight hundred seventeen".