9842657389 has 2 divisors, whose sum is σ = 9842657390. Its totient is φ = 9842657388.

The previous prime is 9842657369. The next prime is 9842657417. The reversal of 9842657389 is 9837562489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6409283364 + 3433374025 = 80058^2 + 58595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9842657389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9842657309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4921328694 + 4921328695.

It is an arithmetic number, because the mean of its divisors is an integer number (4921328695).

Almost surely, 2^9842657389 is an apocalyptic number.

It is an amenable number.

9842657389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9842657389 is an equidigital number, since it uses as much as digits as its factorization.

9842657389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 61.

The square root of 9842657389 is about 99210.1677702442. The cubic root of 9842657389 is about 2143.0754242037.

The spelling of 9842657389 in words is "nine billion, eight hundred forty-two million, six hundred fifty-seven thousand, three hundred eighty-nine".