6971963809 has 2 divisors, whose sum is σ = 6971963810. Its totient is φ = 6971963808.

The previous prime is 6971963773. The next prime is 6971963833. The reversal of 6971963809 is 9083691796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6967574784 + 4389025 = 83472^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 6971963809 - 2¹⁷ = 6971832737 is a prime.

It is not a weakly prime, because it can be changed into another prime (6971963899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3485981904 + 3485981905.

It is an arithmetic number, because the mean of its divisors is an integer number (3485981905).

Almost surely, 2^6971963809 is an apocalyptic number.

It is an amenable number.

6971963809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6971963809 is an equidigital number, since it uses as much as digits as its factorization.

6971963809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 6971963809 is about 83498.2862638509. The cubic root of 6971963809 is about 1910.3738939825.

The spelling of 6971963809 in words is "six billion, nine hundred seventy-one million, nine hundred sixty-three thousand, eight hundred nine".