12981677 has 4 divisors (see below), whose sum is σ = 12998496. Its totient is φ = 12964860.

The previous prime is 12981667. The next prime is 12981679. The reversal of 12981677 is 77618921.

12981677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 77618921 = 2099 ⋅36979.

It is a cyclic number.

It is not a de Polignac number, because 12981677 - 2⁶ = 12981613 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 (12981679) 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, 7193 + ... + 8814.

It is an arithmetic number, because the mean of its divisors is an integer number (3249624).

Almost surely, 2^12981677 is an apocalyptic number.

It is an amenable number.

12981677 is a deficient number, since it is larger than the sum of its proper divisors (16819).

12981677 is an equidigital number, since it uses as much as digits as its factorization.

12981677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16818.

The product of its digits is 42336, while the sum is 41.

The square root of 12981677 is about 3603.0094365683. The cubic root of 12981677 is about 235.0229463032.

The spelling of 12981677 in words is "twelve million, nine hundred eighty-one thousand, six hundred seventy-seven".