705649969 has 2 divisors, whose sum is σ = 705649970. Its totient is φ = 705649968.

The previous prime is 705649937. The next prime is 705649999. The reversal of 705649969 is 969946507.

705649969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355511025 + 350138944 = 18855^2 + 18712^2 .

It is a cyclic number.

It is not a de Polignac number, because 705649969 - 2⁵ = 705649937 is a prime.

It is a super-2 number, since 2×705649969² = 995883757499401922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (705649999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352824984 + 352824985.

It is an arithmetic number, because the mean of its divisors is an integer number (352824985).

Almost surely, 2^705649969 is an apocalyptic number.

It is an amenable number.

705649969 is a deficient number, since it is larger than the sum of its proper divisors (1).

705649969 is an equidigital number, since it uses as much as digits as its factorization.

705649969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The square root of 705649969 is about 26564.0728993127. The cubic root of 705649969 is about 890.2864747109.

The spelling of 705649969 in words is "seven hundred five million, six hundred forty-nine thousand, nine hundred sixty-nine".