706257089 has 2 divisors, whose sum is σ = 706257090. Its totient is φ = 706257088.

The previous prime is 706257047. The next prime is 706257091. The reversal of 706257089 is 980752607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701826064 + 4431025 = 26492^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 706257089 - 2²⁴ = 689479873 is a prime.

Together with 706257091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (706257029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353128544 + 353128545.

It is an arithmetic number, because the mean of its divisors is an integer number (353128545).

Almost surely, 2^706257089 is an apocalyptic number.

It is an amenable number.

706257089 is a deficient number, since it is larger than the sum of its proper divisors (1).

706257089 is an equidigital number, since it uses as much as digits as its factorization.

706257089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 706257089 is about 26575.4979069067. The cubic root of 706257089 is about 890.5417267524.

The spelling of 706257089 in words is "seven hundred six million, two hundred fifty-seven thousand, eighty-nine".