7991343379 has 2 divisors, whose sum is σ = 7991343380. Its totient is φ = 7991343378.

The previous prime is 7991343329. The next prime is 7991343403. The reversal of 7991343379 is 9733431997.

It is a strong prime.

It is an emirp because it is prime and its reverse (9733431997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7991343379 - 2¹⁵ = 7991310611 is a prime.

It is not a weakly prime, because it can be changed into another prime (7991343319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995671689 + 3995671690.

It is an arithmetic number, because the mean of its divisors is an integer number (3995671690).

Almost surely, 2^7991343379 is an apocalyptic number.

7991343379 is a deficient number, since it is larger than the sum of its proper divisors (1).

7991343379 is an equidigital number, since it uses as much as digits as its factorization.

7991343379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 55.

The square root of 7991343379 is about 89394.3140194051. The cubic root of 7991343379 is about 1999.2783545619.

The spelling of 7991343379 in words is "seven billion, nine hundred ninety-one million, three hundred forty-three thousand, three hundred seventy-nine".