630595409 has 2 divisors, whose sum is σ = 630595410. Its totient is φ = 630595408.

The previous prime is 630595391. The next prime is 630595417. The reversal of 630595409 is 904595036.

630595409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497423809 + 133171600 = 22303^2 + 11540^2 .

It is a cyclic number.

It is not a de Polignac number, because 630595409 - 2²⁰ = 629546833 is a prime.

It is not a weakly prime, because it can be changed into another prime (630595489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315297704 + 315297705.

It is an arithmetic number, because the mean of its divisors is an integer number (315297705).

Almost surely, 2^630595409 is an apocalyptic number.

It is an amenable number.

630595409 is a deficient number, since it is larger than the sum of its proper divisors (1).

630595409 is an equidigital number, since it uses as much as digits as its factorization.

630595409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 630595409 is about 25111.6588261309. The cubic root of 630595409 is about 857.5318674532.

The spelling of 630595409 in words is "six hundred thirty million, five hundred ninety-five thousand, four hundred nine".