9942481217 has 2 divisors, whose sum is σ = 9942481218. Its totient is φ = 9942481216.

The previous prime is 9942481207. The next prime is 9942481243. The reversal of 9942481217 is 7121842499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8947457281 + 995023936 = 94591^2 + 31544^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942481217 - 2⁴ = 9942481201 is a prime.

It is not a weakly prime, because it can be changed into another prime (9942481207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971240608 + 4971240609.

It is an arithmetic number, because the mean of its divisors is an integer number (4971240609).

Almost surely, 2^9942481217 is an apocalyptic number.

It is an amenable number.

9942481217 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942481217 is an equidigital number, since it uses as much as digits as its factorization.

9942481217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 9942481217 is about 99711.9913400590. The cubic root of 9942481217 is about 2150.2960628528.

The spelling of 9942481217 in words is "nine billion, nine hundred forty-two million, four hundred eighty-one thousand, two hundred seventeen".