9394879999 has 2 divisors, whose sum is σ = 9394880000. Its totient is φ = 9394879998.

The previous prime is 9394879997. The next prime is 9394880021. The reversal of 9394879999 is 9999784939.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999784939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9394879999 - 2¹ = 9394879997 is a prime.

It is a super-2 number, since 2×9394879999² (a number of 21 digits) contains 22 as substring.

Together with 9394879997, 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 (9394879993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4697439999 + 4697440000.

It is an arithmetic number, because the mean of its divisors is an integer number (4697440000).

Almost surely, 2^9394879999 is an apocalyptic number.

9394879999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9394879999 is an equidigital number, since it uses as much as digits as its factorization.

9394879999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357128352, while the sum is 76.

The square root of 9394879999 is about 96927.1891627937. The cubic root of 9394879999 is about 2110.0710501445.

The spelling of 9394879999 in words is "nine billion, three hundred ninety-four million, eight hundred seventy-nine thousand, nine hundred ninety-nine".