12977947 has 2 divisors, whose sum is σ = 12977948. Its totient is φ = 12977946.

The previous prime is 12977929. The next prime is 12977971. The reversal of 12977947 is 74977921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12977947 - 2¹¹ = 12975899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12977897 and 12977906.

It is not a weakly prime, because it can be changed into another prime (12977927) 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 as a sum of consecutive naturals, namely, 6488973 + 6488974.

It is an arithmetic number, because the mean of its divisors is an integer number (6488974).

Almost surely, 2^12977947 is an apocalyptic number.

12977947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12977947 is an equidigital number, since it uses as much as digits as its factorization.

12977947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 46.

The square root of 12977947 is about 3602.4917765347. The cubic root of 12977947 is about 235.0004345850. Note that the first 3 decimals are identical.

It can be divided in two parts, 12977 and 947, that added together give a square (13924 = 118²).

The spelling of 12977947 in words is "twelve million, nine hundred seventy-seven thousand, nine hundred forty-seven".