845668321 has 8 divisors (see below), whose sum is σ = 909118080. Its totient is φ = 784112688.

The previous prime is 845668319. The next prime is 845668331. The reversal of 845668321 is 123866548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 845668321 - 2¹ = 845668319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (845668331) 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 in 7 ways as a sum of consecutive naturals, for example, 472606 + ... + 474391.

It is an arithmetic number, because the mean of its divisors is an integer number (113639760).

Almost surely, 2^845668321 is an apocalyptic number.

It is an amenable number.

845668321 is a deficient number, since it is larger than the sum of its proper divisors (63449759).

845668321 is a wasteful number, since it uses less digits than its factorization.

845668321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947063.

The product of its digits is 276480, while the sum is 43.

The square root of 845668321 is about 29080.3769060857. The cubic root of 845668321 is about 945.6563736828.

The spelling of 845668321 in words is "eight hundred forty-five million, six hundred sixty-eight thousand, three hundred twenty-one".