9942445517 has 2 divisors, whose sum is σ = 9942445518. Its totient is φ = 9942445516.

The previous prime is 9942445507. The next prime is 9942445567. The reversal of 9942445517 is 7155442499.

It is an a-pointer prime, because the next prime (9942445567) can be obtained adding 9942445517 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., 5094247876 + 4848197641 = 71374^2 + 69629^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942445517 - 2²⁸ = 9674010061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9942445507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971222758 + 4971222759.

It is an arithmetic number, because the mean of its divisors is an integer number (4971222759).

Almost surely, 2^9942445517 is an apocalyptic number.

It is an amenable number.

9942445517 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942445517 is an equidigital number, since it uses as much as digits as its factorization.

9942445517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 9942445517 is about 99711.8123243179. The cubic root of 9942445517 is about 2150.2934891940.

The spelling of 9942445517 in words is "nine billion, nine hundred forty-two million, four hundred forty-five thousand, five hundred seventeen".