3993397 has 2 divisors, whose sum is σ = 3993398. Its totient is φ = 3993396.

The previous prime is 3993377. The next prime is 3993427. The reversal of 3993397 is 7933993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3896676 + 96721 = 1974^2 + 311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993397 is a prime.

3993397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3993377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996698 + 1996699.

It is an arithmetic number, because the mean of its divisors is an integer number (1996699).

Almost surely, 2^3993397 is an apocalyptic number.

It is an amenable number.

3993397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993397 is an equidigital number, since it uses as much as digits as its factorization.

3993397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137781, while the sum is 43.

The square root of 3993397 is about 1998.3485681932. The cubic root of 3993397 is about 158.6527103473.

The spelling of 3993397 in words is "three million, nine hundred ninety-three thousand, three hundred ninety-seven".