705640241 has 2 divisors, whose sum is σ = 705640242. Its totient is φ = 705640240.

The previous prime is 705640223. The next prime is 705640279. The reversal of 705640241 is 142046507.

705640241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690585841 + 15054400 = 26279^2 + 3880^2 .

It is an emirp because it is prime and its reverse (142046507) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705640241 is a prime.

It is not a weakly prime, because it can be changed into another prime (705640291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352820120 + 352820121.

It is an arithmetic number, because the mean of its divisors is an integer number (352820121).

Almost surely, 2^705640241 is an apocalyptic number.

It is an amenable number.

705640241 is a deficient number, since it is larger than the sum of its proper divisors (1).

705640241 is an equidigital number, since it uses as much as digits as its factorization.

705640241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 705640241 is about 26563.8897942301. The cubic root of 705640241 is about 890.2823835671.

Adding to 705640241 its reverse (142046507), we get a palindrome (847686748).

The spelling of 705640241 in words is "seven hundred five million, six hundred forty thousand, two hundred forty-one".