709985 has 8 divisors (see below), whose sum is σ = 858600. Its totient is φ = 563584.

The previous prime is 709981. The next prime is 709991. The reversal of 709985 is 589907.

709985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2704 + 707281 = 52^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 709985 - 2² = 709981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (709981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (107325).

2⁷⁰⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

709985 is a deficient number, since it is larger than the sum of its proper divisors (148615).

709985 is a wasteful number, since it uses less digits than its factorization.

709985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 709985 is about 842.6060764082. The cubic root of 709985 is about 89.2105857922.

The spelling of 709985 in words is "seven hundred nine thousand, nine hundred eighty-five".