2003999971 has 2 divisors, whose sum is σ = 2003999972. Its totient is φ = 2003999970.

The previous prime is 2003999953. The next prime is 2004000043. The reversal of 2003999971 is 1799993002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2003999971 - 2⁷ = 2003999843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2003999941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001999985 + 1001999986.

It is an arithmetic number, because the mean of its divisors is an integer number (1001999986).

Almost surely, 2^2003999971 is an apocalyptic number.

2003999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003999971 is an equidigital number, since it uses as much as digits as its factorization.

2003999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 2003999971 is about 44766.0582472927. The cubic root of 2003999971 is about 1260.7604318364.

The spelling of 2003999971 in words is "two billion, three million, nine hundred ninety-nine thousand, nine hundred seventy-one".