709173 has 6 divisors (see below), whose sum is σ = 1024374. Its totient is φ = 472776.

The previous prime is 709157. The next prime is 709201. The reversal of 709173 is 371907.

709173 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 only one way, i.e., 675684 + 33489 = 822^2 + 183^2 .

It is not a de Polignac number, because 709173 - 2⁴ = 709157 is a prime.

709173 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 709173.

It is not an unprimeable number, because it can be changed into a prime (709123) 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, 39390 + ... + 39407.

It is an arithmetic number, because the mean of its divisors is an integer number (170729).

2⁷⁰⁹¹⁷³ is an apocalyptic number.

It is an amenable number.

709173 is a deficient number, since it is larger than the sum of its proper divisors (315201).

709173 is a wasteful number, since it uses less digits than its factorization.

709173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78803 (or 78800 counting only the distinct ones).

The product of its (nonzero) digits is 1323, while the sum is 27.

The square root of 709173 is about 842.1241001183. The cubic root of 709173 is about 89.1765631818.

The spelling of 709173 in words is "seven hundred nine thousand, one hundred seventy-three".