9938872609 has 2 divisors, whose sum is σ = 9938872610. Its totient is φ = 9938872608.

The previous prime is 9938872577. The next prime is 9938872613. The reversal of 9938872609 is 9062788399.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9418120209 + 520752400 = 97047^2 + 22820^2 .

It is a cyclic number.

It is not a de Polignac number, because 9938872609 - 2⁵ = 9938872577 is a prime.

It is not a weakly prime, because it can be changed into another prime (9938872649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969436304 + 4969436305.

It is an arithmetic number, because the mean of its divisors is an integer number (4969436305).

Almost surely, 2^9938872609 is an apocalyptic number.

It is an amenable number.

9938872609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9938872609 is an equidigital number, since it uses as much as digits as its factorization.

9938872609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The square root of 9938872609 is about 99693.8945422437. The cubic root of 9938872609 is about 2150.0358825091.

The spelling of 9938872609 in words is "nine billion, nine hundred thirty-eight million, eight hundred seventy-two thousand, six hundred nine".