705801321 has 12 divisors (see below), whose sum is σ = 1019784948. Its totient is φ = 470398464.

The previous prime is 705801281. The next prime is 705801323. The reversal of 705801321 is 123108507.

705801321 is a `hidden beast` number, since 70 + 580 + 13 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83997225 + 621804096 = 9165^2 + 24936^2 .

It is not a de Polignac number, because 705801321 - 2¹⁹ = 705277033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (705801323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29281 + ... + 47633.

It is an arithmetic number, because the mean of its divisors is an integer number (84982079).

Almost surely, 2^705801321 is an apocalyptic number.

It is an amenable number.

705801321 is a deficient number, since it is larger than the sum of its proper divisors (313983627).

705801321 is a wasteful number, since it uses less digits than its factorization.

705801321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22632 (or 22629 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 705801321 is about 26566.9215567028. The cubic root of 705801321 is about 890.3501214725.

Adding to 705801321 its reverse (123108507), we get a palindrome (828909828).

The spelling of 705801321 in words is "seven hundred five million, eight hundred one thousand, three hundred twenty-one".