706384778089 has 3 divisors (see below), whose sum is σ = 706385618557. Its totient is φ = 706383937622.

The previous prime is 706384778081. The next prime is 706384778117. The reversal of 706384778089 is 980877483607.

The square root of 706384778089 is 840467.

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

706384778089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 is not a de Polignac number, because 706384778089 - 2³ = 706384778081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706384778081) 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, 420234 + ... + 1260700.

Almost surely, 2^706384778089 is an apocalyptic number.

706384778089 is the 840467-th square number.

706384778089 is the 420234-th centered octagonal number.

It is an amenable number.

706384778089 is a deficient number, since it is larger than the sum of its proper divisors (840468).

706384778089 is an frugal number, since it uses more digits than its factorization.

706384778089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680934 (or 840467 counting only the distinct ones).

The product of its (nonzero) digits is 113799168, while the sum is 67.

The spelling of 706384778089 in words is "seven hundred six billion, three hundred eighty-four million, seven hundred seventy-eight thousand, eighty-nine".