705531643 has 2 divisors, whose sum is σ = 705531644. Its totient is φ = 705531642.

The previous prime is 705531611. The next prime is 705531661. The reversal of 705531643 is 346135507.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 705531643 - 2⁵ = 705531611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 705531599 and 705531608.

It is not a weakly prime, because it can be changed into another prime (705531683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352765821 + 352765822.

It is an arithmetic number, because the mean of its divisors is an integer number (352765822).

Almost surely, 2^705531643 is an apocalyptic number.

705531643 is a deficient number, since it is larger than the sum of its proper divisors (1).

705531643 is an equidigital number, since it uses as much as digits as its factorization.

705531643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 705531643 is about 26561.8456248808. The cubic root of 705531643 is about 890.2367097516.

The spelling of 705531643 in words is "seven hundred five million, five hundred thirty-one thousand, six hundred forty-three".