3997673 has 2 divisors, whose sum is σ = 3997674. Its totient is φ = 3997672.

The previous prime is 3997649. The next prime is 3997723. The reversal of 3997673 is 3767993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2679769 + 1317904 = 1637^2 + 1148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3997673 is a prime.

It is not a weakly prime, because it can be changed into another prime (3997603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998836 + 1998837.

It is an arithmetic number, because the mean of its divisors is an integer number (1998837).

Almost surely, 2^3997673 is an apocalyptic number.

It is an amenable number.

3997673 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997673 is an equidigital number, since it uses as much as digits as its factorization.

3997673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 44.

The square root of 3997673 is about 1999.4181653671. The cubic root of 3997673 is about 158.7093168736.

The spelling of 3997673 in words is "three million, nine hundred ninety-seven thousand, six hundred seventy-three".