705321361 has 2 divisors, whose sum is σ = 705321362. Its totient is φ = 705321360.

The previous prime is 705321359. The next prime is 705321371. The reversal of 705321361 is 163123507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477160336 + 228161025 = 21844^2 + 15105^2 .

It is an emirp because it is prime and its reverse (163123507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705321361 - 2¹ = 705321359 is a prime.

Together with 705321359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (705321371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352660680 + 352660681.

It is an arithmetic number, because the mean of its divisors is an integer number (352660681).

Almost surely, 2^705321361 is an apocalyptic number.

It is an amenable number.

705321361 is a deficient number, since it is larger than the sum of its proper divisors (1).

705321361 is an equidigital number, since it uses as much as digits as its factorization.

705321361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 705321361 is about 26557.8869829661. The cubic root of 705321361 is about 890.1482566637.

Adding to 705321361 its reverse (163123507), we get a palindrome (868444868).

The spelling of 705321361 in words is "seven hundred five million, three hundred twenty-one thousand, three hundred sixty-one".