12981633 has 8 divisors (see below), whose sum is σ = 19781568. Its totient is φ = 7418064.

The previous prime is 12981623. The next prime is 12981643. The reversal of 12981633 is 33618921.

12981633 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12981623) and next prime (12981643).

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

It is not a de Polignac number, because 12981633 - 2⁵ = 12981601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12981594 and 12981603.

It is not an unprimeable number, because it can be changed into a prime (12981613) 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, 309066 + ... + 309107.

It is an arithmetic number, because the mean of its divisors is an integer number (2472696).

Almost surely, 2^12981633 is an apocalyptic number.

It is an amenable number.

12981633 is a deficient number, since it is larger than the sum of its proper divisors (6799935).

12981633 is an equidigital number, since it uses as much as digits as its factorization.

12981633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618183.

The product of its digits is 7776, while the sum is 33.

The square root of 12981633 is about 3603.0033305563. The cubic root of 12981633 is about 235.0226807746.

The spelling of 12981633 in words is "twelve million, nine hundred eighty-one thousand, six hundred thirty-three".