12646989 has 32 divisors (see below), whose sum is σ = 20016000. Its totient is φ = 7869312.

The previous prime is 12646981. The next prime is 12647003. The reversal of 12646989 is 98964621.

It is a happy number.

12646989 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12646989 - 2³ = 12646981 is a prime.

It is a super-2 number, since 2×12646989² = 319892661532242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45519 + ... + 45795.

It is an arithmetic number, because the mean of its divisors is an integer number (625500).

Almost surely, 2^12646989 is an apocalyptic number.

12646989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12646989 is a deficient number, since it is larger than the sum of its proper divisors (7369011).

12646989 is a wasteful number, since it uses less digits than its factorization.

12646989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 388 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 12646989 is about 3556.2605360125. The cubic root of 12646989 is about 232.9855824366.

The spelling of 12646989 in words is "twelve million, six hundred forty-six thousand, nine hundred eighty-nine".