630709 has 2 divisors, whose sum is σ = 630710. Its totient is φ = 630708.

The previous prime is 630701. The next prime is 630713. The reversal of 630709 is 907036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324900 + 305809 = 570^2 + 553^2 .

It is a cyclic number.

It is not a de Polignac number, because 630709 - 2³ = 630701 is a prime.

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

It is equal to p₅₁₃₈₈ and since 630709 and 51388 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315354 + 315355.

It is an arithmetic number, because the mean of its divisors is an integer number (315355).

2⁶³⁰⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

630709 is a deficient number, since it is larger than the sum of its proper divisors (1).

630709 is an equidigital number, since it uses as much as digits as its factorization.

630709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 630709 is about 794.1718957505. The cubic root of 630709 is about 85.7583354272.

The spelling of 630709 in words is "six hundred thirty thousand, seven hundred nine".