3993785969 has 2 divisors, whose sum is σ = 3993785970. Its totient is φ = 3993785968.

The previous prime is 3993785927. The next prime is 3993785977. The reversal of 3993785969 is 9695873993.

3993785969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2005696225 + 1988089744 = 44785^2 + 44588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993785969 is a prime.

It is a super-2 number, since 2×3993785969² = 31900652732362537922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3993785899 and 3993785908.

It is not a weakly prime, because it can be changed into another prime (3993785909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996892984 + 1996892985.

It is an arithmetic number, because the mean of its divisors is an integer number (1996892985).

Almost surely, 2^3993785969 is an apocalyptic number.

It is an amenable number.

3993785969 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993785969 is an equidigital number, since it uses as much as digits as its factorization.

3993785969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 99202320, while the sum is 68.

The square root of 3993785969 is about 63196.4078805117. The cubic root of 3993785969 is about 1586.5786126536.

The spelling of 3993785969 in words is "three billion, nine hundred ninety-three million, seven hundred eighty-five thousand, nine hundred sixty-nine".