2042643049 has 2 divisors, whose sum is σ = 2042643050. Its totient is φ = 2042643048.

The previous prime is 2042643047. The next prime is 2042643067. The reversal of 2042643049 is 9403462402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1642843024 + 399800025 = 40532^2 + 19995^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042643049 - 2¹ = 2042643047 is a prime.

Together with 2042643047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2042643047) 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 as a sum of consecutive naturals, namely, 1021321524 + 1021321525.

It is an arithmetic number, because the mean of its divisors is an integer number (1021321525).

Almost surely, 2^2042643049 is an apocalyptic number.

It is an amenable number.

2042643049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042643049 is an equidigital number, since it uses as much as digits as its factorization.

2042643049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 2042643049 is about 45195.6087358053. The cubic root of 2042643049 is about 1268.8126313198.

The spelling of 2042643049 in words is "two billion, forty-two million, six hundred forty-three thousand, forty-nine".