9885669389 has 2 divisors, whose sum is σ = 9885669390. Its totient is φ = 9885669388.

The previous prime is 9885669319. The next prime is 9885669403. The reversal of 9885669389 is 9839665889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346284164 + 1539385225 = 91358^2 + 39235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9885669389 is a prime.

It is a super-2 number, since 2×9885669389² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9885669319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4942834694 + 4942834695.

It is an arithmetic number, because the mean of its divisors is an integer number (4942834695).

Almost surely, 2^9885669389 is an apocalyptic number.

It is an amenable number.

9885669389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9885669389 is an equidigital number, since it uses as much as digits as its factorization.

9885669389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201553920, while the sum is 71.

The square root of 9885669389 is about 99426.7036011956. The cubic root of 9885669389 is about 2146.1926045296.

The spelling of 9885669389 in words is "nine billion, eight hundred eighty-five million, six hundred sixty-nine thousand, three hundred eighty-nine".