999996031 has 2 divisors, whose sum is σ = 999996032. Its totient is φ = 999996030.

The previous prime is 999996029. The next prime is 999996037. The reversal of 999996031 is 130699999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999996031 - 2¹ = 999996029 is a prime.

It is a super-2 number, since 2×999996031² = 1999984124031505922, which contains 22 as substring.

Together with 999996029, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999996037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998015 + 499998016.

It is an arithmetic number, because the mean of its divisors is an integer number (499998016).

Almost surely, 2^999996031 is an apocalyptic number.

999996031 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996031 is an equidigital number, since it uses as much as digits as its factorization.

999996031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1062882, while the sum is 55.

The square root of 999996031 is about 31622.7138462214. The cubic root of 999996031 is about 999.9986769982.

It can be divided in two parts, 99999 and 6031, that added together give a triangular number (106030 = T₄₆₀).

The spelling of 999996031 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, thirty-one".