630817 has 4 divisors (see below), whose sum is σ = 688176. Its totient is φ = 573460.

The previous prime is 630803. The next prime is 630823. The reversal of 630817 is 718036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630817 - 2⁷ = 630689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630791 and 630800.

It is not an unprimeable number, because it can be changed into a prime (630827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28663 + ... + 28684.

It is an arithmetic number, because the mean of its divisors is an integer number (172044).

2⁶³⁰⁸¹⁷ is an apocalyptic number.

It is an amenable number.

630817 is a deficient number, since it is larger than the sum of its proper divisors (57359).

630817 is a wasteful number, since it uses less digits than its factorization.

630817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57358.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 630817 is about 794.2398881950. The cubic root of 630817 is about 85.7632301153.

The spelling of 630817 in words is "six hundred thirty thousand, eight hundred seventeen".