705664159 has 4 divisors (see below), whose sum is σ = 706005016. Its totient is φ = 705323304.

The previous prime is 705664151. The next prime is 705664177. The reversal of 705664159 is 951466507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 705664159 - 2³ = 705664151 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 (705664151) 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, 167304 + ... + 171469.

It is an arithmetic number, because the mean of its divisors is an integer number (176501254).

Almost surely, 2^705664159 is an apocalyptic number.

705664159 is a deficient number, since it is larger than the sum of its proper divisors (340857).

705664159 is a wasteful number, since it uses less digits than its factorization.

705664159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340856.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 705664159 is about 26564.3399880366. The cubic root of 705664159 is about 890.2924422968.

The spelling of 705664159 in words is "seven hundred five million, six hundred sixty-four thousand, one hundred fifty-nine".