4138405049 has 2 divisors, whose sum is σ = 4138405050. Its totient is φ = 4138405048.

The previous prime is 4138405043. The next prime is 4138405057. The reversal of 4138405049 is 9405048314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3567911824 + 570493225 = 59732^2 + 23885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4138405049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4138405043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069202524 + 2069202525.

It is an arithmetic number, because the mean of its divisors is an integer number (2069202525).

Almost surely, 2^4138405049 is an apocalyptic number.

It is an amenable number.

4138405049 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138405049 is an equidigital number, since it uses as much as digits as its factorization.

4138405049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 4138405049 is about 64330.4364123235. The cubic root of 4138405049 is about 1605.5025453087.

The spelling of 4138405049 in words is "four billion, one hundred thirty-eight million, four hundred five thousand, forty-nine".