9986999969 has 2 divisors, whose sum is σ = 9986999970. Its totient is φ = 9986999968.

The previous prime is 9986999951. The next prime is 9986999999. The reversal of 9986999969 is 9699996899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7427854225 + 2559145744 = 86185^2 + 50588^2 .

It is a cyclic number.

It is not a de Polignac number, because 9986999969 - 2¹² = 9986995873 is a prime.

It is a super-2 number, since 2×9986999969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9986999999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993499984 + 4993499985.

It is an arithmetic number, because the mean of its divisors is an integer number (4993499985).

Almost surely, 2^9986999969 is an apocalyptic number.

It is an amenable number.

9986999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986999969 is an equidigital number, since it uses as much as digits as its factorization.

9986999969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377495072, while the sum is 83.

The square root of 9986999969 is about 99934.9787061567. The cubic root of 9986999969 is about 2153.5006945906.

The spelling of 9986999969 in words is "nine billion, nine hundred eighty-six million, nine hundred ninety-nine thousand, nine hundred sixty-nine".