705506321 has 4 divisors (see below), whose sum is σ = 759776052. Its totient is φ = 651236592.

The previous prime is 705506231. The next prime is 705506323. The reversal of 705506321 is 123605507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107019025 + 598487296 = 10345^2 + 24464^2 .

It is a cyclic number.

It is not a de Polignac number, because 705506321 - 2²⁶ = 638397457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705506323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27134846 + ... + 27134871.

It is an arithmetic number, because the mean of its divisors is an integer number (189944013).

Almost surely, 2^705506321 is an apocalyptic number.

It is an amenable number.

705506321 is a deficient number, since it is larger than the sum of its proper divisors (54269731).

705506321 is a wasteful number, since it uses less digits than its factorization.

705506321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54269730.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 705506321 is about 26561.3689594494. The cubic root of 705506321 is about 890.2260592282.

The spelling of 705506321 in words is "seven hundred five million, five hundred six thousand, three hundred twenty-one".