999706429 has 2 divisors, whose sum is σ = 999706430. Its totient is φ = 999706428.

The previous prime is 999706427. The next prime is 999706447. The reversal of 999706429 is 924607999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 981130329 + 18576100 = 31323^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 999706429 - 2¹ = 999706427 is a prime.

Together with 999706427, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 999706429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999706427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499853214 + 499853215.

It is an arithmetic number, because the mean of its divisors is an integer number (499853215).

Almost surely, 2^999706429 is an apocalyptic number.

It is an amenable number.

999706429 is a deficient number, since it is larger than the sum of its proper divisors (1).

999706429 is an equidigital number, since it uses as much as digits as its factorization.

999706429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 999706429 is about 31618.1344958870. The cubic root of 999706429 is about 999.9021334224.

The spelling of 999706429 in words is "nine hundred ninety-nine million, seven hundred six thousand, four hundred twenty-nine".