3993901 has 2 divisors, whose sum is σ = 3993902. Its totient is φ = 3993900.

The previous prime is 3993893. The next prime is 3993907. The reversal of 3993901 is 1093993.

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., 2941225 + 1052676 = 1715^2 + 1026^2 .

It is an emirp because it is prime and its reverse (1093993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3993901 - 2³ = 3993893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3993907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996950 + 1996951.

It is an arithmetic number, because the mean of its divisors is an integer number (1996951).

Almost surely, 2^3993901 is an apocalyptic number.

It is an amenable number.

3993901 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993901 is an equidigital number, since it uses as much as digits as its factorization.

3993901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 3993901 is about 1998.4746683408. The cubic root of 3993901 is about 158.6593844981.

The spelling of 3993901 in words is "three million, nine hundred ninety-three thousand, nine hundred one".