9942565679 has 2 divisors, whose sum is σ = 9942565680. Its totient is φ = 9942565678.

The previous prime is 9942565657. The next prime is 9942565681. The reversal of 9942565679 is 9765652499.

9942565679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9942565679 is a prime.

It is a super-2 number, since 2×9942565679² (a number of 21 digits) contains 22 as substring.

Together with 9942565681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9942565609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971282839 + 4971282840.

It is an arithmetic number, because the mean of its divisors is an integer number (4971282840).

Almost surely, 2^9942565679 is an apocalyptic number.

9942565679 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942565679 is an equidigital number, since it uses as much as digits as its factorization.

9942565679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 62.

The square root of 9942565679 is about 99712.4148689620. The cubic root of 9942565679 is about 2150.3021518021.

The spelling of 9942565679 in words is "nine billion, nine hundred forty-two million, five hundred sixty-five thousand, six hundred seventy-nine".