9979910089 has 2 divisors, whose sum is σ = 9979910090. Its totient is φ = 9979910088.

The previous prime is 9979910051. The next prime is 9979910107. The reversal of 9979910089 is 9800199799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9543726864 + 436183225 = 97692^2 + 20885^2 .

It is a cyclic number.

It is not a de Polignac number, because 9979910089 - 2¹¹ = 9979908041 is a prime.

It is not a weakly prime, because it can be changed into another prime (9979910029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989955044 + 4989955045.

It is an arithmetic number, because the mean of its divisors is an integer number (4989955045).

Almost surely, 2^9979910089 is an apocalyptic number.

It is an amenable number.

9979910089 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979910089 is an equidigital number, since it uses as much as digits as its factorization.

9979910089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3306744, while the sum is 61.

The square root of 9979910089 is about 99899.4999436934. The cubic root of 9979910089 is about 2152.9909760911.

The spelling of 9979910089 in words is "nine billion, nine hundred seventy-nine million, nine hundred ten thousand, eighty-nine".