9879694939 has 2 divisors, whose sum is σ = 9879694940. Its totient is φ = 9879694938.

The previous prime is 9879694849. The next prime is 9879694949. The reversal of 9879694939 is 9394969789.

It is a strong prime.

It is an emirp because it is prime and its reverse (9394969789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9879694939 - 2¹¹ = 9879692891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9879694949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939847469 + 4939847470.

It is an arithmetic number, because the mean of its divisors is an integer number (4939847470).

Almost surely, 2^9879694939 is an apocalyptic number.

9879694939 is a deficient number, since it is larger than the sum of its proper divisors (1).

9879694939 is an equidigital number, since it uses as much as digits as its factorization.

9879694939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238085568, while the sum is 73.

The square root of 9879694939 is about 99396.6545664390. The cubic root of 9879694939 is about 2145.7601635943.

The spelling of 9879694939 in words is "nine billion, eight hundred seventy-nine million, six hundred ninety-four thousand, nine hundred thirty-nine".