706258409 has 2 divisors, whose sum is σ = 706258410. Its totient is φ = 706258408.

The previous prime is 706258391. The next prime is 706258417. The reversal of 706258409 is 904852607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622352809 + 83905600 = 24947^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 706258409 - 2¹⁶ = 706192873 is a prime.

It is a super-2 number, since 2×706258409² = 997601880566422562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (706258459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353129204 + 353129205.

It is an arithmetic number, because the mean of its divisors is an integer number (353129205).

Almost surely, 2^706258409 is an apocalyptic number.

It is an amenable number.

706258409 is a deficient number, since it is larger than the sum of its proper divisors (1).

706258409 is an equidigital number, since it uses as much as digits as its factorization.

706258409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 706258409 is about 26575.5227418013. The cubic root of 706258409 is about 890.5422815619.

The spelling of 706258409 in words is "seven hundred six million, two hundred fifty-eight thousand, four hundred nine".