709825 has 6 divisors (see below), whose sum is σ = 880214. Its totient is φ = 567840.

The previous prime is 709823. The next prime is 709831. The reversal of 709825 is 528907.

It can be written as a sum of positive squares in 3 ways, for example, as 204304 + 505521 = 452^2 + 711^2 .

It is not a de Polignac number, because 709825 - 2¹ = 709823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14172 + ... + 14221.

2⁷⁰⁹⁸²⁵ is an apocalyptic number.

It is an amenable number.

709825 is a deficient number, since it is larger than the sum of its proper divisors (170389).

709825 is a wasteful number, since it uses less digits than its factorization.

709825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28403 (or 28398 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 709825 is about 842.5111275230. The cubic root of 709825 is about 89.2038838824.

The spelling of 709825 in words is "seven hundred nine thousand, eight hundred twenty-five".