705879857 has 4 divisors (see below), whose sum is σ = 706151796. Its totient is φ = 705607920.

The previous prime is 705879847. The next prime is 705879859. The reversal of 705879857 is 758978507.

705879857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 526748401 + 179131456 = 22951^2 + 13384^2 .

It is a cyclic number.

It is not a de Polignac number, because 705879857 - 2¹² = 705875761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705879859) 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, 132038 + ... + 137279.

It is an arithmetic number, because the mean of its divisors is an integer number (176537949).

Almost surely, 2^705879857 is an apocalyptic number.

It is an amenable number.

705879857 is a deficient number, since it is larger than the sum of its proper divisors (271939).

705879857 is a wasteful number, since it uses less digits than its factorization.

705879857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271938.

The product of its (nonzero) digits is 4939200, while the sum is 56.

The square root of 705879857 is about 26568.3995942548. The cubic root of 705879857 is about 890.3831439589.

The spelling of 705879857 in words is "seven hundred five million, eight hundred seventy-nine thousand, eight hundred fifty-seven".