709117252281 has 9 divisors (see below), whose sum is σ = 1024284124591. Its totient is φ = 472743150672.

The previous prime is 709117252271. The next prime is 709117252301. The reversal of 709117252281 is 182252711907.

The square root of 709117252281 is 842091.

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

709117252281 is a `hidden beast` number, since 7 + 0 + 9 + 117 + 2 + 522 + 8 + 1 = 666.

709117252281 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., 89093295225 + 620023957056 = 298485^2 + 787416^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 709117252281 - 2¹⁹ = 709116727993 is a prime.

It is a super-2 number, since 2×709117252281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709117252271) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2385925 + ... + 2666621.

Almost surely, 2^709117252281 is an apocalyptic number.

709117252281 is the 842091-st square number.

709117252281 is the 421046-th centered octagonal number.

It is an amenable number.

709117252281 is a deficient number, since it is larger than the sum of its proper divisors (315166872310).

709117252281 is an frugal number, since it uses more digits than its factorization.

709117252281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561400 (or 280700 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 709117252281 in words is "seven hundred nine billion, one hundred seventeen million, two hundred fifty-two thousand, two hundred eighty-one".