7963957121 has 2 divisors, whose sum is σ = 7963957122. Its totient is φ = 7963957120.

The previous prime is 7963957117. The next prime is 7963957171. The reversal of 7963957121 is 1217593697.

It is an a-pointer prime, because the next prime (7963957171) can be obtained adding 7963957121 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4973070400 + 2990886721 = 70520^2 + 54689^2 .

It is a cyclic number.

It is not a de Polignac number, because 7963957121 - 2² = 7963957117 is a prime.

It is a super-2 number, since 2×7963957121² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7963957121.

It is not a weakly prime, because it can be changed into another prime (7963957171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3981978560 + 3981978561.

It is an arithmetic number, because the mean of its divisors is an integer number (3981978561).

Almost surely, 2^7963957121 is an apocalyptic number.

It is an amenable number.

7963957121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7963957121 is an equidigital number, since it uses as much as digits as its factorization.

7963957121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 7963957121 is about 89241.0058269179. The cubic root of 7963957121 is about 1996.9919046996.

The spelling of 7963957121 in words is "seven billion, nine hundred sixty-three million, nine hundred fifty-seven thousand, one hundred twenty-one".