709736161 has 2 divisors, whose sum is σ = 709736162. Its totient is φ = 709736160.

The previous prime is 709736147. The next prime is 709736177. The reversal of 709736161 is 161637907.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451137600 + 258598561 = 21240^2 + 16081^2 .

It is an emirp because it is prime and its reverse (161637907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709736161 - 2²⁵ = 676181729 is a prime.

It is not a weakly prime, because it can be changed into another prime (709736141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354868080 + 354868081.

It is an arithmetic number, because the mean of its divisors is an integer number (354868081).

Almost surely, 2^709736161 is an apocalyptic number.

It is an amenable number.

709736161 is a deficient number, since it is larger than the sum of its proper divisors (1).

709736161 is an equidigital number, since it uses as much as digits as its factorization.

709736161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 709736161 is about 26640.8738783096. The cubic root of 709736161 is about 892.0016225412.

The spelling of 709736161 in words is "seven hundred nine million, seven hundred thirty-six thousand, one hundred sixty-one".