9878657699 has 2 divisors, whose sum is σ = 9878657700. Its totient is φ = 9878657698.

The previous prime is 9878657689. The next prime is 9878657717. The reversal of 9878657699 is 9967568789.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9967568789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9878657699 - 2⁸ = 9878657443 is a prime.

It is not a weakly prime, because it can be changed into another prime (9878657609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939328849 + 4939328850.

It is an arithmetic number, because the mean of its divisors is an integer number (4939328850).

Almost surely, 2^9878657699 is an apocalyptic number.

9878657699 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878657699 is an equidigital number, since it uses as much as digits as its factorization.

9878657699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 411505920, while the sum is 74.

The square root of 9878657699 is about 99391.4367488467. The cubic root of 9878657699 is about 2145.6850686250.

The spelling of 9878657699 in words is "nine billion, eight hundred seventy-eight million, six hundred fifty-seven thousand, six hundred ninety-nine".