12677981 has 4 divisors (see below), whose sum is σ = 12693600. Its totient is φ = 12662364.

The previous prime is 12677957. The next prime is 12677989. The reversal of 12677981 is 18977621.

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.

It is a cyclic number.

It is not a de Polignac number, because 12677981 - 2¹⁰ = 12676957 is a prime.

It is a super-2 number, since 2×12677981² = 321462404472722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12677989) 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 3 ways as a sum of consecutive naturals, for example, 6521 + ... + 8238.

It is an arithmetic number, because the mean of its divisors is an integer number (3173400).

Almost surely, 2^12677981 is an apocalyptic number.

It is an amenable number.

12677981 is a deficient number, since it is larger than the sum of its proper divisors (15619).

12677981 is an equidigital number, since it uses as much as digits as its factorization.

12677981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618.

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

The square root of 12677981 is about 3560.6152558231. The cubic root of 12677981 is about 233.1757409790.

The spelling of 12677981 in words is "twelve million, six hundred seventy-seven thousand, nine hundred eighty-one".