706415209 has 2 divisors, whose sum is σ = 706415210. Its totient is φ = 706415208.

The previous prime is 706415191. The next prime is 706415239. The reversal of 706415209 is 902514607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614792025 + 91623184 = 24795^2 + 9572^2 .

It is an emirp because it is prime and its reverse (902514607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 706415209 - 2⁷ = 706415081 is a prime.

It is not a weakly prime, because it can be changed into another prime (706415239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353207604 + 353207605.

It is an arithmetic number, because the mean of its divisors is an integer number (353207605).

Almost surely, 2^706415209 is an apocalyptic number.

It is an amenable number.

706415209 is a deficient number, since it is larger than the sum of its proper divisors (1).

706415209 is an equidigital number, since it uses as much as digits as its factorization.

706415209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 706415209 is about 26578.4726611594. The cubic root of 706415209 is about 890.6081812833.

The spelling of 706415209 in words is "seven hundred six million, four hundred fifteen thousand, two hundred nine".