709081 has 4 divisors (see below), whose sum is σ = 710964. Its totient is φ = 707200.

The previous prime is 709057. The next prime is 709097. The reversal of 709081 is 180907.

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 160000 + 549081 = 400^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 709081 - 2⁹ = 708569 is a prime.

It is a super-2 number, since 2×709081² = 1005591729122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (177741).

2⁷⁰⁹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

709081 is a deficient number, since it is larger than the sum of its proper divisors (1883).

709081 is a wasteful number, since it uses less digits than its factorization.

709081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 709081 is about 842.0694745685. The cubic root of 709081 is about 89.1727067657.

Adding to 709081 its reverse (180907), we get a palindrome (889988).

The spelling of 709081 in words is "seven hundred nine thousand, eighty-one".