706005409 has 2 divisors, whose sum is σ = 706005410. Its totient is φ = 706005408.

The previous prime is 706005407. The next prime is 706005431. The reversal of 706005409 is 904500607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556016400 + 149989009 = 23580^2 + 12247^2 .

It is an emirp because it is prime and its reverse (904500607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 706005409 - 2¹ = 706005407 is a prime.

Together with 706005407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (706005407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353002704 + 353002705.

It is an arithmetic number, because the mean of its divisors is an integer number (353002705).

Almost surely, 2^706005409 is an apocalyptic number.

It is an amenable number.

706005409 is a deficient number, since it is larger than the sum of its proper divisors (1).

706005409 is an equidigital number, since it uses as much as digits as its factorization.

706005409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 706005409 is about 26570.7622961781. The cubic root of 706005409 is about 890.4359304477.

The spelling of 706005409 in words is "seven hundred six million, five thousand, four hundred nine".