9678752939 has 2 divisors, whose sum is σ = 9678752940. Its totient is φ = 9678752938.

The previous prime is 9678752917. The next prime is 9678752971. The reversal of 9678752939 is 9392578769.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9678752939 is a prime.

It is a super-2 number, since 2×9678752939² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9678752339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4839376469 + 4839376470.

It is an arithmetic number, because the mean of its divisors is an integer number (4839376470).

Almost surely, 2^9678752939 is an apocalyptic number.

9678752939 is a deficient number, since it is larger than the sum of its proper divisors (1).

9678752939 is an equidigital number, since it uses as much as digits as its factorization.

9678752939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 65.

The square root of 9678752939 is about 98380.6532759363. The cubic root of 9678752939 is about 2131.1129495621.

The spelling of 9678752939 in words is "nine billion, six hundred seventy-eight million, seven hundred fifty-two thousand, nine hundred thirty-nine".