4003963 has 2 divisors, whose sum is σ = 4003964. Its totient is φ = 4003962.

The previous prime is 4003949. The next prime is 4003973. The reversal of 4003963 is 3693004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4003963 - 2²¹ = 1906811 is a prime.

It is not a weakly prime, because it can be changed into another prime (4003913) 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, 2001981 + 2001982.

It is an arithmetic number, because the mean of its divisors is an integer number (2001982).

Almost surely, 2^4003963 is an apocalyptic number.

4003963 is a deficient number, since it is larger than the sum of its proper divisors (1).

4003963 is an equidigital number, since it uses as much as digits as its factorization.

4003963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 4003963 is about 2000.9905047251. The cubic root of 4003963 is about 158.7925118131.

Adding to 4003963 its reverse (3693004), we get a palindrome (7696967).

The spelling of 4003963 in words is "four million, three thousand, nine hundred sixty-three".