9912869 has 2 divisors, whose sum is σ = 9912870. Its totient is φ = 9912868.

The previous prime is 9912829. The next prime is 9912871. The reversal of 9912869 is 9682199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8196769 + 1716100 = 2863^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 9912869 - 2⁸ = 9912613 is a prime.

It is a super-2 number, since 2×9912869² = 196529943622322, which contains 22 as substring.

Together with 9912871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9912829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956434 + 4956435.

It is an arithmetic number, because the mean of its divisors is an integer number (4956435).

Almost surely, 2^9912869 is an apocalyptic number.

It is an amenable number.

9912869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9912869 is an equidigital number, since it uses as much as digits as its factorization.

9912869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 9912869 is about 3148.4708987062. The cubic root of 9912869 is about 214.8159159847.

The spelling of 9912869 in words is "nine million, nine hundred twelve thousand, eight hundred sixty-nine".