705491 has 2 divisors, whose sum is σ = 705492. Its totient is φ = 705490.

The previous prime is 705461. The next prime is 705493. The reversal of 705491 is 194507.

It is a strong prime.

It is an emirp because it is prime and its reverse (194507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705491 - 2⁶ = 705427 is a prime.

Together with 705493, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 705491.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 705491.

It is not a weakly prime, because it can be changed into another prime (705493) 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 as a sum of consecutive naturals, namely, 352745 + 352746.

It is an arithmetic number, because the mean of its divisors is an integer number (352746).

2⁷⁰⁵⁴⁹¹ is an apocalyptic number.

705491 is a deficient number, since it is larger than the sum of its proper divisors (1).

705491 is an equidigital number, since it uses as much as digits as its factorization.

705491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 705491 is about 839.9351165417. The cubic root of 705491 is about 89.0219615037.

Adding to 705491 its reverse (194507), we get a palindrome (899998).

The spelling of 705491 in words is "seven hundred five thousand, four hundred ninety-one".