8920009909 has 2 divisors, whose sum is σ = 8920009910. Its totient is φ = 8920009908.

The previous prime is 8920009907. The next prime is 8920009919. The reversal of 8920009909 is 9099000298.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6842929284 + 2077080625 = 82722^2 + 45575^2 .

It is a cyclic number.

It is not a de Polignac number, because 8920009909 - 2¹ = 8920009907 is a prime.

Together with 8920009907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8920009907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460004954 + 4460004955.

It is an arithmetic number, because the mean of its divisors is an integer number (4460004955).

Almost surely, 2^8920009909 is an apocalyptic number.

It is an amenable number.

8920009909 is a deficient number, since it is larger than the sum of its proper divisors (1).

8920009909 is an equidigital number, since it uses as much as digits as its factorization.

8920009909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 8920009909 is about 94445.8040836119. The cubic root of 8920009909 is about 2073.9030275880.

The spelling of 8920009909 in words is "eight billion, nine hundred twenty million, nine thousand, nine hundred nine".