2818123549 has 2 divisors, whose sum is σ = 2818123550. Its totient is φ = 2818123548.

The previous prime is 2818123531. The next prime is 2818123559. The reversal of 2818123549 is 9453218182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1946397924 + 871725625 = 44118^2 + 29525^2 .

It is a cyclic number.

It is not a de Polignac number, because 2818123549 - 2²⁹ = 2281252637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2818123519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409061774 + 1409061775.

It is an arithmetic number, because the mean of its divisors is an integer number (1409061775).

Almost surely, 2^2818123549 is an apocalyptic number.

It is an amenable number.

2818123549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2818123549 is an equidigital number, since it uses as much as digits as its factorization.

2818123549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 2818123549 is about 53086.0014410579. The cubic root of 2818123549 is about 1412.4942102668.

The spelling of 2818123549 in words is "two billion, eight hundred eighteen million, one hundred twenty-three thousand, five hundred forty-nine".