12957889 has 4 divisors (see below), whose sum is σ = 14809024. Its totient is φ = 11106756.

The previous prime is 12957869. The next prime is 12957911. The reversal of 12957889 is 98875921.

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 an emirpimes, since its reverse is a distinct semiprime: 98875921 = 47 ⋅2103743.

It is a cyclic number.

It is not a de Polignac number, because 12957889 - 2⁷ = 12957761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12957839) 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, 925557 + ... + 925570.

It is an arithmetic number, because the mean of its divisors is an integer number (3702256).

Almost surely, 2^12957889 is an apocalyptic number.

It is an amenable number.

12957889 is a deficient number, since it is larger than the sum of its proper divisors (1851135).

12957889 is an equidigital number, since it uses as much as digits as its factorization.

12957889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851134.

The product of its digits is 362880, while the sum is 49.

The square root of 12957889 is about 3599.7067936153. The cubic root of 12957889 is about 234.8793042505.

The spelling of 12957889 in words is "twelve million, nine hundred fifty-seven thousand, eight hundred eighty-nine".