705308489 has 4 divisors (see below), whose sum is σ = 721711056. Its totient is φ = 688905924.

The previous prime is 705308477. The next prime is 705308521. The reversal of 705308489 is 984803507.

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.

It is a de Polignac number, because none of the positive numbers 2^k-705308489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705308419) 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, 8201219 + ... + 8201304.

It is an arithmetic number, because the mean of its divisors is an integer number (180427764).

Almost surely, 2^705308489 is an apocalyptic number.

It is an amenable number.

705308489 is a deficient number, since it is larger than the sum of its proper divisors (16402567).

705308489 is a wasteful number, since it uses less digits than its factorization.

705308489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16402566.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 705308489 is about 26557.6446433037. The cubic root of 705308489 is about 890.1428416105.

The spelling of 705308489 in words is "seven hundred five million, three hundred eight thousand, four hundred eighty-nine".