9889009679 has 2 divisors, whose sum is σ = 9889009680. Its totient is φ = 9889009678.

The previous prime is 9889009649. The next prime is 9889009699. The reversal of 9889009679 is 9769009889.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9889009679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9889009609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944504839 + 4944504840.

It is an arithmetic number, because the mean of its divisors is an integer number (4944504840).

Almost surely, 2^9889009679 is an apocalyptic number.

9889009679 is a deficient number, since it is larger than the sum of its proper divisors (1).

9889009679 is an equidigital number, since it uses as much as digits as its factorization.

9889009679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 65.

The square root of 9889009679 is about 99443.4999333793. The cubic root of 9889009679 is about 2146.4343045139.

The spelling of 9889009679 in words is "nine billion, eight hundred eighty-nine million, nine thousand, six hundred seventy-nine".