2003663947 has 2 divisors, whose sum is σ = 2003663948. Its totient is φ = 2003663946.

The previous prime is 2003663939. The next prime is 2003663983. The reversal of 2003663947 is 7493663002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2003663947 - 2³ = 2003663939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2003663927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001831973 + 1001831974.

It is an arithmetic number, because the mean of its divisors is an integer number (1001831974).

Almost surely, 2^2003663947 is an apocalyptic number.

2003663947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003663947 is an equidigital number, since it uses as much as digits as its factorization.

2003663947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 2003663947 is about 44762.3049786313. The cubic root of 2003663947 is about 1260.6899612026.

The spelling of 2003663947 in words is "two billion, three million, six hundred sixty-three thousand, nine hundred forty-seven".