12649863 has 8 divisors (see below), whose sum is σ = 16888176. Its totient is φ = 8422400.

The previous prime is 12649841. The next prime is 12649873. The reversal of 12649863 is 36894621.

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

It is a cyclic number.

It is not a de Polignac number, because 12649863 - 2²⁰ = 11601287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649823) 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, 583 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (2111022).

Almost surely, 2^12649863 is an apocalyptic number.

12649863 is a deficient number, since it is larger than the sum of its proper divisors (4238313).

12649863 is an equidigital number, since it uses as much as digits as its factorization.

12649863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425.

The product of its digits is 62208, while the sum is 39.

The square root of 12649863 is about 3556.6645891903. The cubic root of 12649863 is about 233.0032295843.

The spelling of 12649863 in words is "twelve million, six hundred forty-nine thousand, eight hundred sixty-three".