7992018217 has 2 divisors, whose sum is σ = 7992018218. Its totient is φ = 7992018216.

The previous prime is 7992018197. The next prime is 7992018233. The reversal of 7992018217 is 7128102997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7696728361 + 295289856 = 87731^2 + 17184^2 .

It is a cyclic number.

It is not a de Polignac number, because 7992018217 - 2³¹ = 5844534569 is a prime.

It is not a weakly prime, because it can be changed into another prime (7992013217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996009108 + 3996009109.

It is an arithmetic number, because the mean of its divisors is an integer number (3996009109).

Almost surely, 2^7992018217 is an apocalyptic number.

It is an amenable number.

7992018217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7992018217 is an equidigital number, since it uses as much as digits as its factorization.

7992018217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 7992018217 is about 89398.0884415321. The cubic root of 7992018217 is about 1999.3346300827.

The spelling of 7992018217 in words is "seven billion, nine hundred ninety-two million, eighteen thousand, two hundred seventeen".