1000100999 has 2 divisors, whose sum is σ = 1000101000. Its totient is φ = 1000100998.

The previous prime is 1000100993. The next prime is 1000101079. The reversal of 1000100999 is 9990010001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000100999 - 2²⁰ = 999052423 is a prime.

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 (1000100993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500050499 + 500050500.

It is an arithmetic number, because the mean of its divisors is an integer number (500050500).

Almost surely, 2^1000100999 is an apocalyptic number.

1000100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000100999 is an equidigital number, since it uses as much as digits as its factorization.

1000100999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 1000100999 is about 31624.3734957706. The cubic root of 1000100999 is about 1000.0336652000.

The spelling of 1000100999 in words is "one billion, one hundred thousand, nine hundred ninety-nine".