4138663709 has 2 divisors, whose sum is σ = 4138663710. Its totient is φ = 4138663708.

The previous prime is 4138663693. The next prime is 4138663729. The reversal of 4138663709 is 9073668314.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3186941209 + 951722500 = 56453^2 + 30850^2 .

It is a cyclic number.

It is not a de Polignac number, because 4138663709 - 2⁴ = 4138663693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138663729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069331854 + 2069331855.

It is an arithmetic number, because the mean of its divisors is an integer number (2069331855).

Almost surely, 2^4138663709 is an apocalyptic number.

It is an amenable number.

4138663709 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138663709 is an equidigital number, since it uses as much as digits as its factorization.

4138663709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 4138663709 is about 64332.4467823197. The cubic root of 4138663709 is about 1605.5359938339.

The spelling of 4138663709 in words is "four billion, one hundred thirty-eight million, six hundred sixty-three thousand, seven hundred nine".