7961719291 has 2 divisors, whose sum is σ = 7961719292. Its totient is φ = 7961719290.

The previous prime is 7961719267. The next prime is 7961719319. The reversal of 7961719291 is 1929171697.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7961719291 - 2¹¹ = 7961717243 is a prime.

It is not a weakly prime, because it can be changed into another prime (7961719211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980859645 + 3980859646.

It is an arithmetic number, because the mean of its divisors is an integer number (3980859646).

Almost surely, 2^7961719291 is an apocalyptic number.

7961719291 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961719291 is an equidigital number, since it uses as much as digits as its factorization.

7961719291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 52.

The square root of 7961719291 is about 89228.4668197319. The cubic root of 7961719291 is about 1996.8048391084.

The spelling of 7961719291 in words is "seven billion, nine hundred sixty-one million, seven hundred nineteen thousand, two hundred ninety-one".