999990097999 has 2 divisors, whose sum is σ = 999990098000. Its totient is φ = 999990097998.

The previous prime is 999990097987. The next prime is 999990098083. The reversal of 999990097999 is 999790099999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999990097999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999990097919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499995048999 + 499995049000.

It is an arithmetic number, because the mean of its divisors is an integer number (499995049000).

Almost surely, 2^999990097999 is an apocalyptic number.

999990097999 is a deficient number, since it is larger than the sum of its proper divisors (1).

999990097999 is an equidigital number, since it uses as much as digits as its factorization.

999990097999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2711943423, while the sum is 88.

The spelling of 999990097999 in words is "nine hundred ninety-nine billion, nine hundred ninety million, ninety-seven thousand, nine hundred ninety-nine".