999997995803 has 2 divisors, whose sum is σ = 999997995804. Its totient is φ = 999997995802.

The previous prime is 999997995743. The next prime is 999997995827. The reversal of 999997995803 is 308599799999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999997995803 - 2⁶ = 999997995739 is a prime.

It is a super-2 number, since 2×999997995803² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (999997995863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998997901 + 499998997902.

It is an arithmetic number, because the mean of its divisors is an integer number (499998997902).

Almost surely, 2^999997995803 is an apocalyptic number.

999997995803 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997995803 is an equidigital number, since it uses as much as digits as its factorization.

999997995803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4017693960, while the sum is 86.

The spelling of 999997995803 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-five thousand, eight hundred three".