3938956909 has 2 divisors, whose sum is σ = 3938956910. Its totient is φ = 3938956908.

The previous prime is 3938956883. The next prime is 3938956919. The reversal of 3938956909 is 9096598393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3875436009 + 63520900 = 62253^2 + 7970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3938956909 - 2¹⁹ = 3938432621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3938956919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969478454 + 1969478455.

It is an arithmetic number, because the mean of its divisors is an integer number (1969478455).

Almost surely, 2^3938956909 is an apocalyptic number.

It is an amenable number.

3938956909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938956909 is an equidigital number, since it uses as much as digits as its factorization.

3938956909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14171760, while the sum is 61.

The square root of 3938956909 is about 62761.1098451900. The cubic root of 3938956909 is about 1579.2846343642.

The spelling of 3938956909 in words is "three billion, nine hundred thirty-eight million, nine hundred fifty-six thousand, nine hundred nine".