1005500999 has 2 divisors, whose sum is σ = 1005501000. Its totient is φ = 1005500998.

The previous prime is 1005500987. The next prime is 1005501017. The reversal of 1005500999 is 9990055001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005500999 - 2⁴ = 1005500983 is a prime.

It is a super-2 number, since 2×1005500999² = 2022064517979996002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005500399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502750499 + 502750500.

It is an arithmetic number, because the mean of its divisors is an integer number (502750500).

Almost surely, 2^1005500999 is an apocalyptic number.

1005500999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005500999 is an equidigital number, since it uses as much as digits as its factorization.

1005500999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 1005500999 is about 31709.6357437294. The cubic root of 1005500999 is about 1001.8303142392.

The spelling of 1005500999 in words is "one billion, five million, five hundred thousand, nine hundred ninety-nine".