9685135819 has 2 divisors, whose sum is σ = 9685135820. Its totient is φ = 9685135818.

The previous prime is 9685135781. The next prime is 9685135861. The reversal of 9685135819 is 9185315869.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9685135819 - 2²⁹ = 9148264907 is a prime.

It is a super-2 number, since 2×9685135819² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9685135819.

It is not a weakly prime, because it can be changed into another prime (9685135879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4842567909 + 4842567910.

It is an arithmetic number, because the mean of its divisors is an integer number (4842567910).

Almost surely, 2^9685135819 is an apocalyptic number.

9685135819 is a deficient number, since it is larger than the sum of its proper divisors (1).

9685135819 is an equidigital number, since it uses as much as digits as its factorization.

9685135819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 55.

The square root of 9685135819 is about 98413.0876408214. The cubic root of 9685135819 is about 2131.5813173781.

The spelling of 9685135819 in words is "nine billion, six hundred eighty-five million, one hundred thirty-five thousand, eight hundred nineteen".