634709 has 2 divisors, whose sum is σ = 634710. Its totient is φ = 634708.

The previous prime is 634703. The next prime is 634717. The reversal of 634709 is 907436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 10609 = 790^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 634709 - 2¹² = 630613 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317354 + 317355.

It is an arithmetic number, because the mean of its divisors is an integer number (317355).

2⁶³⁴⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

634709 is a deficient number, since it is larger than the sum of its proper divisors (1).

634709 is an equidigital number, since it uses as much as digits as its factorization.

634709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 634709 is about 796.6862619626. The cubic root of 634709 is about 85.9392486035.

The spelling of 634709 in words is "six hundred thirty-four thousand, seven hundred nine".