9869239657609 has 2 divisors, whose sum is σ = 9869239657610. Its totient is φ = 9869239657608.

The previous prime is 9869239657579. The next prime is 9869239657639. The reversal of 9869239657609 is 9067569329689.

It is a balanced prime because it is at equal distance from previous prime (9869239657579) and next prime (9869239657639).

It can be written as a sum of positive squares in only one way, i.e., 8210287929600 + 1658951728009 = 2865360^2 + 1288003^2 .

It is a cyclic number.

It is not a de Polignac number, because 9869239657609 - 2⁷ = 9869239657481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9869239657639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4934619828804 + 4934619828805.

It is an arithmetic number, because the mean of its divisors is an integer number (4934619828805).

Almost surely, 2^{9869239657609} is an apocalyptic number.

It is an amenable number.

9869239657609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9869239657609 is an equidigital number, since it uses as much as digits as its factorization.

9869239657609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2380855680, while the sum is 79.

The spelling of 9869239657609 in words is "nine trillion, eight hundred sixty-nine billion, two hundred thirty-nine million, six hundred fifty-seven thousand, six hundred nine".