12873869 has 2 divisors, whose sum is σ = 12873870. Its totient is φ = 12873868.

The previous prime is 12873857. The next prime is 12873871. The reversal of 12873869 is 96837821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11812969 + 1060900 = 3437^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 12873869 - 2⁴ = 12873853 is a prime.

It is a super-2 number, since 2×12873869² = 331473006058322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12873871, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12872869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436934 + 6436935.

It is an arithmetic number, because the mean of its divisors is an integer number (6436935).

Almost surely, 2^12873869 is an apocalyptic number.

It is an amenable number.

12873869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12873869 is an equidigital number, since it uses as much as digits as its factorization.

12873869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 12873869 is about 3588.0174191327. The cubic root of 12873869 is about 234.3705442471.

The spelling of 12873869 in words is "twelve million, eight hundred seventy-three thousand, eight hundred sixty-nine".