9953279909 has 2 divisors, whose sum is σ = 9953279910. Its totient is φ = 9953279908.

The previous prime is 9953279891. The next prime is 9953279929. The reversal of 9953279909 is 9099723599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9311671009 + 641608900 = 96497^2 + 25330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9953279909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9953279929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4976639954 + 4976639955.

It is an arithmetic number, because the mean of its divisors is an integer number (4976639955).

Almost surely, 2^9953279909 is an apocalyptic number.

It is an amenable number.

9953279909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9953279909 is an equidigital number, since it uses as much as digits as its factorization.

9953279909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12400290, while the sum is 62.

The square root of 9953279909 is about 99766.1260599007. The cubic root of 9953279909 is about 2151.0742717919.

The spelling of 9953279909 in words is "nine billion, nine hundred fifty-three million, two hundred seventy-nine thousand, nine hundred nine".