9969909867 has 40 divisors (see below), whose sum is σ = 15380077680. Its totient is φ = 6432229440.

The previous prime is 9969909821. The next prime is 9969909877. The reversal of 9969909867 is 7689099699.

It is not a de Polignac number, because 9969909867 - 2²⁰ = 9968861291 is a prime.

It is a super-2 number, since 2×9969909867² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9969909795 and 9969909804.

It is not an unprimeable number, because it can be changed into a prime (9969909877) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 366517 + ... + 392777.

It is an arithmetic number, because the mean of its divisors is an integer number (384501942).

Almost surely, 2^9969909867 is an apocalyptic number.

9969909867 is a deficient number, since it is larger than the sum of its proper divisors (5410167813).

9969909867 is a wasteful number, since it uses less digits than its factorization.

9969909867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26425 (or 26416 counting only the distinct ones).

The product of its (nonzero) digits is 119042784, while the sum is 72.

The square root of 9969909867 is about 99849.4359873905. The cubic root of 9969909867 is about 2152.2716114561.

The spelling of 9969909867 in words is "nine billion, nine hundred sixty-nine million, nine hundred nine thousand, eight hundred sixty-seven".