705664349 has 4 divisors (see below), whose sum is σ = 759946236. Its totient is φ = 651382464.

The previous prime is 705664307. The next prime is 705664363. The reversal of 705664349 is 943466507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943466507 = 103 ⋅9159869.

It can be written as a sum of positive squares in 2 ways, for example, as 244703449 + 460960900 = 15643^2 + 21470^2 .

It is a cyclic number.

It is not a de Polignac number, because 705664349 - 2⁸ = 705664093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705664049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27140924 + ... + 27140949.

It is an arithmetic number, because the mean of its divisors is an integer number (189986559).

Almost surely, 2^705664349 is an apocalyptic number.

It is an amenable number.

705664349 is a deficient number, since it is larger than the sum of its proper divisors (54281887).

705664349 is a wasteful number, since it uses less digits than its factorization.

705664349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54281886.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 705664349 is about 26564.3435642592. The cubic root of 705664349 is about 890.2925222005.

The spelling of 705664349 in words is "seven hundred five million, six hundred sixty-four thousand, three hundred forty-nine".