3938366669 has 2 divisors, whose sum is σ = 3938366670. Its totient is φ = 3938366668.

The previous prime is 3938366611. The next prime is 3938366687. The reversal of 3938366669 is 9666638393.

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., 3932544100 + 5822569 = 62710^2 + 2413^2 .

It is an emirp because it is prime and its reverse (9666638393) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3938366669 is a prime.

It is a super-2 number, since 2×3938366669² = 31021464038980311122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3938366609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969183334 + 1969183335.

It is an arithmetic number, because the mean of its divisors is an integer number (1969183335).

Almost surely, 2^3938366669 is an apocalyptic number.

It is an amenable number.

3938366669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3938366669 is an equidigital number, since it uses as much as digits as its factorization.

3938366669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22674816, while the sum is 59.

The square root of 3938366669 is about 62756.4073939865. The cubic root of 3938366669 is about 1579.2057468526.

The spelling of 3938366669 in words is "three billion, nine hundred thirty-eight million, three hundred sixty-six thousand, six hundred sixty-nine".