12638833 has 4 divisors (see below), whose sum is σ = 12649968. Its totient is φ = 12627700.

The previous prime is 12638827. The next prime is 12638839. The reversal of 12638833 is 33883621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33883621 = 509 ⋅66569.

It is an interprime number because it is at equal distance from previous prime (12638827) and next prime (12638839).

It is a cyclic number.

It is not a de Polignac number, because 12638833 - 2¹³ = 12630641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643 + ... + 6208.

It is an arithmetic number, because the mean of its divisors is an integer number (3162492).

Almost surely, 2^12638833 is an apocalyptic number.

It is an amenable number.

12638833 is a deficient number, since it is larger than the sum of its proper divisors (11135).

12638833 is an equidigital number, since it uses as much as digits as its factorization.

12638833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134.

The product of its digits is 20736, while the sum is 34.

The square root of 12638833 is about 3555.1136409403. The cubic root of 12638833 is about 232.9354877977.

The spelling of 12638833 in words is "twelve million, six hundred thirty-eight thousand, eight hundred thirty-three".