12977843 has 2 divisors, whose sum is σ = 12977844. Its totient is φ = 12977842.

The previous prime is 12977837. The next prime is 12977857. The reversal of 12977843 is 34877921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12977843 - 2⁴ = 12977827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12977843.

It is not a weakly prime, because it can be changed into another prime (12977803) 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, 6488921 + 6488922.

It is an arithmetic number, because the mean of its divisors is an integer number (6488922).

Almost surely, 2^12977843 is an apocalyptic number.

12977843 is a deficient number, since it is larger than the sum of its proper divisors (1).

12977843 is an equidigital number, since it uses as much as digits as its factorization.

12977843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 12977843 is about 3602.4773420523. The cubic root of 12977843 is about 234.9998068506. Note that the first 3 decimals are identical.

The spelling of 12977843 in words is "twelve million, nine hundred seventy-seven thousand, eight hundred forty-three".