709345129 has 2 divisors, whose sum is σ = 709345130. Its totient is φ = 709345128.

The previous prime is 709345127. The next prime is 709345171. The reversal of 709345129 is 921543907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 509179225 + 200165904 = 22565^2 + 14148^2 .

It is a cyclic number.

It is not a de Polignac number, because 709345129 - 2¹ = 709345127 is a prime.

Together with 709345127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 709345091 and 709345100.

It is not a weakly prime, because it can be changed into another prime (709345127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354672564 + 354672565.

It is an arithmetic number, because the mean of its divisors is an integer number (354672565).

Almost surely, 2^709345129 is an apocalyptic number.

It is an amenable number.

709345129 is a deficient number, since it is larger than the sum of its proper divisors (1).

709345129 is an equidigital number, since it uses as much as digits as its factorization.

709345129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 709345129 is about 26633.5339187273. The cubic root of 709345129 is about 891.8377751497.

The spelling of 709345129 in words is "seven hundred nine million, three hundred forty-five thousand, one hundred twenty-nine".