12543779 has 2 divisors, whose sum is σ = 12543780. Its totient is φ = 12543778.

The previous prime is 12543767. The next prime is 12543787. The reversal of 12543779 is 97734521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12543779 - 2⁸ = 12543523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12543799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271889 + 6271890.

It is an arithmetic number, because the mean of its divisors is an integer number (6271890).

Almost surely, 2^12543779 is an apocalyptic number.

12543779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543779 is an equidigital number, since it uses as much as digits as its factorization.

12543779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 12543779 is about 3541.7197799939. The cubic root of 12543779 is about 232.3500648132.

The spelling of 12543779 in words is "twelve million, five hundred forty-three thousand, seven hundred seventy-nine".