999472709 has 2 divisors, whose sum is σ = 999472710. Its totient is φ = 999472708.

The previous prime is 999472699. The next prime is 999472717. The reversal of 999472709 is 907274999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 995591809 + 3880900 = 31553^2 + 1970^2 .

It is an emirp because it is prime and its reverse (907274999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999472709 - 2¹⁶ = 999407173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999472729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499736354 + 499736355.

It is an arithmetic number, because the mean of its divisors is an integer number (499736355).

Almost surely, 2^999472709 is an apocalyptic number.

It is an amenable number.

999472709 is a deficient number, since it is larger than the sum of its proper divisors (1).

999472709 is an equidigital number, since it uses as much as digits as its factorization.

999472709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The square root of 999472709 is about 31614.4382996124. The cubic root of 999472709 is about 999.8242054314.

The spelling of 999472709 in words is "nine hundred ninety-nine million, four hundred seventy-two thousand, seven hundred nine".