3816942809 has 2 divisors, whose sum is σ = 3816942810. Its totient is φ = 3816942808.

The previous prime is 3816942761. The next prime is 3816942821. The reversal of 3816942809 is 9082496183.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2228123209 + 1588819600 = 47203^2 + 39860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3816942809 is a prime.

It is not a weakly prime, because it can be changed into another prime (3816942869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908471404 + 1908471405.

It is an arithmetic number, because the mean of its divisors is an integer number (1908471405).

Almost surely, 2^3816942809 is an apocalyptic number.

It is an amenable number.

3816942809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3816942809 is an equidigital number, since it uses as much as digits as its factorization.

3816942809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 3816942809 is about 61781.4115167337. The cubic root of 3816942809 is about 1562.8065313828.

The spelling of 3816942809 in words is "three billion, eight hundred sixteen million, nine hundred forty-two thousand, eight hundred nine".