12868989 has 8 divisors (see below), whose sum is σ = 19609920. Its totient is φ = 7353696.

The previous prime is 12868979. The next prime is 12868991. The reversal of 12868989 is 98986821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12868989 - 2⁷ = 12868861 is a prime.

It is a super-2 number, since 2×12868989² = 331221755764242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12868939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306384 + ... + 306425.

It is an arithmetic number, because the mean of its divisors is an integer number (2451240).

Almost surely, 2^12868989 is an apocalyptic number.

It is an amenable number.

12868989 is a deficient number, since it is larger than the sum of its proper divisors (6740931).

12868989 is an equidigital number, since it uses as much as digits as its factorization.

12868989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612819.

The product of its digits is 497664, while the sum is 51.

The square root of 12868989 is about 3587.3373133844. The cubic root of 12868989 is about 234.3409268156.

It can be divided in two parts, 128689 and 89, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 12868989 in words is "twelve million, eight hundred sixty-eight thousand, nine hundred eighty-nine".