7971811459 has 2 divisors, whose sum is σ = 7971811460. Its totient is φ = 7971811458.

The previous prime is 7971811451. The next prime is 7971811483. The reversal of 7971811459 is 9541181797.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7971811459 - 2³ = 7971811451 is a prime.

It is not a weakly prime, because it can be changed into another prime (7971811451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985905729 + 3985905730.

It is an arithmetic number, because the mean of its divisors is an integer number (3985905730).

Almost surely, 2^7971811459 is an apocalyptic number.

7971811459 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971811459 is an equidigital number, since it uses as much as digits as its factorization.

7971811459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 52.

The square root of 7971811459 is about 89285.0013104105. The cubic root of 7971811459 is about 1997.6481904967.

The spelling of 7971811459 in words is "seven billion, nine hundred seventy-one million, eight hundred eleven thousand, four hundred fifty-nine".