999968345 has 4 divisors (see below), whose sum is σ = 1199962020. Its totient is φ = 799974672.

The previous prime is 999968341. The next prime is 999968399. The reversal of 999968345 is 543869999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543869999 = 7309 ⋅74411.

It can be written as a sum of positive squares in 2 ways, for example, as 116035984 + 883932361 = 10772^2 + 29731^2 .

It is a cyclic number.

It is not a de Polignac number, because 999968345 - 2² = 999968341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999968341) 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 3 ways as a sum of consecutive naturals, for example, 99996830 + ... + 99996839.

It is an arithmetic number, because the mean of its divisors is an integer number (299990505).

Almost surely, 2^999968345 is an apocalyptic number.

It is an amenable number.

999968345 is a deficient number, since it is larger than the sum of its proper divisors (199993675).

999968345 is a wasteful number, since it uses less digits than its factorization.

999968345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199993674.

The product of its digits is 18895680, while the sum is 62.

The square root of 999968345 is about 31622.2760882262. The cubic root of 999968345 is about 999.9894482220.

The spelling of 999968345 in words is "nine hundred ninety-nine million, nine hundred sixty-eight thousand, three hundred forty-five".