7997607997 has 2 divisors, whose sum is σ = 7997607998. Its totient is φ = 7997607996.

The previous prime is 7997607983. The next prime is 7997608019. The reversal of 7997607997 is 7997067997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4095232036 + 3902375961 = 63994^2 + 62469^2 .

It is a cyclic number.

It is not a de Polignac number, because 7997607997 - 2¹⁹ = 7997083709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7997607967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998803998 + 3998803999.

It is an arithmetic number, because the mean of its divisors is an integer number (3998803999).

Almost surely, 2^7997607997 is an apocalyptic number.

It is an amenable number.

7997607997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997607997 is an equidigital number, since it uses as much as digits as its factorization.

7997607997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94517766, while the sum is 70.

The square root of 7997607997 is about 89429.3463970301. The cubic root of 7997607997 is about 1999.8006465464.

The spelling of 7997607997 in words is "seven billion, nine hundred ninety-seven million, six hundred seven thousand, nine hundred ninety-seven".