709889 has 4 divisors (see below), whose sum is σ = 715440. Its totient is φ = 704340.

The previous prime is 709879. The next prime is 709901. The reversal of 709889 is 988907.

709889 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988907 = 17 ⋅58171.

It is a cyclic number.

It is not a de Polignac number, because 709889 - 2¹⁶ = 644353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709879) 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, 2579 + ... + 2840.

It is an arithmetic number, because the mean of its divisors is an integer number (178860).

2⁷⁰⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

709889 is a deficient number, since it is larger than the sum of its proper divisors (5551).

709889 is a wasteful number, since it uses less digits than its factorization.

709889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 709889 is about 842.5491083610. The cubic root of 709889 is about 89.2065647672.

The spelling of 709889 in words is "seven hundred nine thousand, eight hundred eighty-nine".