706032721 has 2 divisors, whose sum is σ = 706032722. Its totient is φ = 706032720.

The previous prime is 706032689. The next prime is 706032739. The reversal of 706032721 is 127230607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576960400 + 129072321 = 24020^2 + 11361^2 .

It is a cyclic number.

It is not a de Polignac number, because 706032721 - 2⁵ = 706032689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 706032721.

It is not a weakly prime, because it can be changed into another prime (706032791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353016360 + 353016361.

It is an arithmetic number, because the mean of its divisors is an integer number (353016361).

Almost surely, 2^706032721 is an apocalyptic number.

It is an amenable number.

706032721 is a deficient number, since it is larger than the sum of its proper divisors (1).

706032721 is an equidigital number, since it uses as much as digits as its factorization.

706032721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 706032721 is about 26571.2762395787. The cubic root of 706032721 is about 890.4474125469.

The spelling of 706032721 in words is "seven hundred six million, thirty-two thousand, seven hundred twenty-one".