630340385 has 4 divisors (see below), whose sum is σ = 756408468. Its totient is φ = 504272304.

The previous prime is 630340367. The next prime is 630340387. The reversal of 630340385 is 583043036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237190801 + 393149584 = 15401^2 + 19828^2 .

It is a cyclic number.

It is not a de Polignac number, because 630340385 - 2²⁴ = 613563169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630340387) 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 in 3 ways as a sum of consecutive naturals, for example, 63034034 + ... + 63034043.

It is an arithmetic number, because the mean of its divisors is an integer number (189102117).

Almost surely, 2^630340385 is an apocalyptic number.

It is an amenable number.

630340385 is a deficient number, since it is larger than the sum of its proper divisors (126068083).

630340385 is a wasteful number, since it uses less digits than its factorization.

630340385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126068082.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 630340385 is about 25106.5805118897. The cubic root of 630340385 is about 857.4162514859.

The spelling of 630340385 in words is "six hundred thirty million, three hundred forty thousand, three hundred eighty-five".