1000555663 has 2 divisors, whose sum is σ = 1000555664. Its totient is φ = 1000555662.

The previous prime is 1000555631. The next prime is 1000555667. The reversal of 1000555663 is 3665550001.

It is a strong prime.

It is an emirp because it is prime and its reverse (3665550001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000555663 - 2⁵ = 1000555631 is a prime.

It is a super-2 number, since 2×1000555663² = 2002223269522739138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000555667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500277831 + 500277832.

It is an arithmetic number, because the mean of its divisors is an integer number (500277832).

Almost surely, 2^1000555663 is an apocalyptic number.

1000555663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000555663 is an equidigital number, since it uses as much as digits as its factorization.

1000555663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1000555663 is about 31631.5611849937. The cubic root of 1000555663 is about 1000.1851867038.

The spelling of 1000555663 in words is "one billion, five hundred fifty-five thousand, six hundred sixty-three".