3993785897 has 2 divisors, whose sum is σ = 3993785898. Its totient is φ = 3993785896.

The previous prime is 3993785869. The next prime is 3993785909. The reversal of 3993785897 is 7985873993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3743481856 + 250304041 = 61184^2 + 15821^2 .

It is a cyclic number.

It is not a de Polignac number, because 3993785897 - 2⁸ = 3993785641 is a prime.

It is not a weakly prime, because it can be changed into another prime (3993785857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996892948 + 1996892949.

It is an arithmetic number, because the mean of its divisors is an integer number (1996892949).

Almost surely, 2^3993785897 is an apocalyptic number.

It is an amenable number.

3993785897 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993785897 is an equidigital number, since it uses as much as digits as its factorization.

3993785897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102876480, while the sum is 68.

The square root of 3993785897 is about 63196.4073108591. The cubic root of 3993785897 is about 1586.5786031193.

The spelling of 3993785897 in words is "three billion, nine hundred ninety-three million, seven hundred eighty-five thousand, eight hundred ninety-seven".