12897777 has 8 divisors (see below), whose sum is σ = 17415040. Its totient is φ = 8489520.

The previous prime is 12897769. The next prime is 12897803. The reversal of 12897777 is 77779821.

12897777 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12897777 - 2³ = 12897769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12897077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26974 + ... + 27447.

It is an arithmetic number, because the mean of its divisors is an integer number (2176880).

Almost surely, 2^12897777 is an apocalyptic number.

It is an amenable number.

12897777 is a deficient number, since it is larger than the sum of its proper divisors (4517263).

12897777 is an equidigital number, since it uses as much as digits as its factorization.

12897777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54503.

The product of its digits is 345744, while the sum is 48.

The square root of 12897777 is about 3591.3475186899. The cubic root of 12897777 is about 234.5155373311.

The spelling of 12897777 in words is "twelve million, eight hundred ninety-seven thousand, seven hundred seventy-seven".