1988003663 has 2 divisors, whose sum is σ = 1988003664. Its totient is φ = 1988003662.

The previous prime is 1988003657. The next prime is 1988003669. The reversal of 1988003663 is 3663008891.

It is a balanced prime because it is at equal distance from previous prime (1988003657) and next prime (1988003669).

It is an emirp because it is prime and its reverse (3663008891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1988003663 is a prime.

It is a Sophie Germain prime.

1988003663 is a modest number, since divided by 3663 gives 1988 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988003669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994001831 + 994001832.

It is an arithmetic number, because the mean of its divisors is an integer number (994001832).

Almost surely, 2^1988003663 is an apocalyptic number.

1988003663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988003663 is an equidigital number, since it uses as much as digits as its factorization.

1988003663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1988003663 is about 44587.0346961984. The cubic root of 1988003663 is about 1257.3969235180.

The spelling of 1988003663 in words is "one billion, nine hundred eighty-eight million, three thousand, six hundred sixty-three".