630808217 has 12 divisors (see below), whose sum is σ = 691309584. Its totient is φ = 575256240.

The previous prime is 630808193. The next prime is 630808219. The reversal of 630808217 is 712808036.

It is not a de Polignac number, because 630808217 - 2¹⁰ = 630807193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630808219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8459 + ... + 36512.

It is an arithmetic number, because the mean of its divisors is an integer number (57609132).

Almost surely, 2^630808217 is an apocalyptic number.

It is an amenable number.

630808217 is a deficient number, since it is larger than the sum of its proper divisors (60501367).

630808217 is a wasteful number, since it uses less digits than its factorization.

630808217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45080 (or 45067 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 630808217 is about 25115.8957037172. The cubic root of 630808217 is about 857.6283208022.

The spelling of 630808217 in words is "six hundred thirty million, eight hundred eight thousand, two hundred seventeen".