12821893 has 8 divisors (see below), whose sum is σ = 15515712. Its totient is φ = 10343616.

The previous prime is 12821891. The next prime is 12821899. The reversal of 12821893 is 39812821.

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

It is not a de Polignac number, because 12821893 - 2¹ = 12821891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821891) 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 7 ways as a sum of consecutive naturals, for example, 53755 + ... + 53992.

It is an arithmetic number, because the mean of its divisors is an integer number (1939464).

Almost surely, 2^12821893 is an apocalyptic number.

It is an amenable number.

12821893 is a deficient number, since it is larger than the sum of its proper divisors (2693819).

12821893 is a wasteful number, since it uses less digits than its factorization.

12821893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107771.

The product of its digits is 6912, while the sum is 34.

The square root of 12821893 is about 3580.7670965870. The cubic root of 12821893 is about 234.0547087608.

The spelling of 12821893 in words is "twelve million, eight hundred twenty-one thousand, eight hundred ninety-three".