7971149051 has 2 divisors, whose sum is σ = 7971149052. Its totient is φ = 7971149050.

The previous prime is 7971149027. The next prime is 7971149089. The reversal of 7971149051 is 1509411797.

It is a weak prime.

It is an emirp because it is prime and its reverse (1509411797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7971149051 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 7971148993 and 7971149011.

It is not a weakly prime, because it can be changed into another prime (7971149551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985574525 + 3985574526.

It is an arithmetic number, because the mean of its divisors is an integer number (3985574526).

Almost surely, 2^7971149051 is an apocalyptic number.

7971149051 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971149051 is an equidigital number, since it uses as much as digits as its factorization.

7971149051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 44.

The square root of 7971149051 is about 89281.2917189262. The cubic root of 7971149051 is about 1997.5928582466.

The spelling of 7971149051 in words is "seven billion, nine hundred seventy-one million, one hundred forty-nine thousand, fifty-one".