999706427 has 2 divisors, whose sum is σ = 999706428. Its totient is φ = 999706426.

The previous prime is 999706387. The next prime is 999706429. The reversal of 999706427 is 724607999.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (724607999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999706427 - 2⁶ = 999706363 is a prime.

Together with 999706429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999706429) 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, 499853213 + 499853214.

It is an arithmetic number, because the mean of its divisors is an integer number (499853214).

Almost surely, 2^999706427 is an apocalyptic number.

999706427 is a deficient number, since it is larger than the sum of its proper divisors (1).

999706427 is an equidigital number, since it uses as much as digits as its factorization.

999706427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The square root of 999706427 is about 31618.1344642596. The cubic root of 999706427 is about 999.9021327556.

The spelling of 999706427 in words is "nine hundred ninety-nine million, seven hundred six thousand, four hundred twenty-seven".