9942685609 has 2 divisors, whose sum is σ = 9942685610. Its totient is φ = 9942685608.

The previous prime is 9942685559. The next prime is 9942685639. The reversal of 9942685609 is 9065862499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5470821225 + 4471864384 = 73965^2 + 66872^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942685609 - 2¹³ = 9942677417 is a prime.

It is not a weakly prime, because it can be changed into another prime (9942685639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971342804 + 4971342805.

It is an arithmetic number, because the mean of its divisors is an integer number (4971342805).

Almost surely, 2^9942685609 is an apocalyptic number.

It is an amenable number.

9942685609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942685609 is an equidigital number, since it uses as much as digits as its factorization.

9942685609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The square root of 9942685609 is about 99713.0162466265. The cubic root of 9942685609 is about 2150.3107976154.

The spelling of 9942685609 in words is "nine billion, nine hundred forty-two million, six hundred eighty-five thousand, six hundred nine".