709316689 has 3 divisors (see below), whose sum is σ = 709343323. Its totient is φ = 709290056.

The previous prime is 709316669. The next prime is 709316693. The reversal of 709316689 is 986613907.

The square root of 709316689 is 26633.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 702515025 + 6801664 = 26505^2 + 2608^2 .

It is not a de Polignac number, because 709316689 - 2¹³ = 709308497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709316639) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13317 + ... + 39949.

Almost surely, 2^709316689 is an apocalyptic number.

709316689 is the 26633-rd square number.

709316689 is the 13317-th centered octagonal number.

It is an amenable number.

709316689 is a deficient number, since it is larger than the sum of its proper divisors (26634).

709316689 is an frugal number, since it uses more digits than its factorization.

709316689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53266 (or 26633 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The cubic root of 709316689 is about 891.8258560785.

Multiplying 709316689 by its sum of digits (49), we get a square (34756517761 = 186431²).

The spelling of 709316689 in words is "seven hundred nine million, three hundred sixteen thousand, six hundred eighty-nine".