999340647 has 16 divisors (see below), whose sum is σ = 1339027200. Its totient is φ = 662950400.

The previous prime is 999340619. The next prime is 999340673. The reversal of 999340647 is 746043999.

It is a cyclic number.

It is not a de Polignac number, because 999340647 - 2¹⁹ = 998816359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999340647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999340747) 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 in 15 ways as a sum of consecutive naturals, for example, 660622 + ... + 662132.

It is an arithmetic number, because the mean of its divisors is an integer number (83689200).

Almost surely, 2^999340647 is an apocalyptic number.

999340647 is a deficient number, since it is larger than the sum of its proper divisors (339686553).

999340647 is a wasteful number, since it uses less digits than its factorization.

999340647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 999340647 is about 31612.3495963207. The cubic root of 999340647 is about 999.7801673438.

The spelling of 999340647 in words is "nine hundred ninety-nine million, three hundred forty thousand, six hundred forty-seven".