630811 has 4 divisors (see below), whose sum is σ = 632952. Its totient is φ = 628672.

The previous prime is 630803. The next prime is 630823. The reversal of 630811 is 118036.

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

It is a cyclic number.

It is not a de Polignac number, because 630811 - 2³ = 630803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630841) 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, 541 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (158238).

2⁶³⁰⁸¹¹ is an apocalyptic number.

630811 is a deficient number, since it is larger than the sum of its proper divisors (2141).

630811 is a wasteful number, since it uses less digits than its factorization.

630811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 630811 is about 794.2361109897. The cubic root of 630811 is about 85.7629582029.

Adding to 630811 its reverse (118036), we get a palindrome (748847).

It can be divided in two parts, 630 and 811, that added together give a palindrome (1441).

The spelling of 630811 in words is "six hundred thirty thousand, eight hundred eleven".