12957928789 has 4 divisors (see below), whose sum is σ = 13954692556. Its totient is φ = 11961165024.

The previous prime is 12957928747. The next prime is 12957928817. The reversal of 12957928789 is 98782975921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5033902500 + 7924026289 = 70950^2 + 89017^2 .

It is a cyclic number.

It is not a de Polignac number, because 12957928789 - 2⁷ = 12957928661 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 (12957926789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498381864 + ... + 498381889.

It is an arithmetic number, because the mean of its divisors is an integer number (3488673139).

Almost surely, 2^12957928789 is an apocalyptic number.

It is an amenable number.

12957928789 is a deficient number, since it is larger than the sum of its proper divisors (996763767).

12957928789 is an equidigital number, since it uses as much as digits as its factorization.

12957928789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996763766.

The product of its digits is 45722880, while the sum is 67.

The spelling of 12957928789 in words is "twelve billion, nine hundred fifty-seven million, nine hundred twenty-eight thousand, seven hundred eighty-nine".