630161 has 4 divisors (see below), whose sum is σ = 720192. Its totient is φ = 540132.

The previous prime is 630151. The next prime is 630163. The reversal of 630161 is 161036.

630161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 630161 - 2¹⁰ = 629137 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630163) 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, 45005 + ... + 45018.

It is an arithmetic number, because the mean of its divisors is an integer number (180048).

2⁶³⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

630161 is a deficient number, since it is larger than the sum of its proper divisors (90031).

630161 is an equidigital number, since it uses as much as digits as its factorization.

630161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90030.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 630161 is about 793.8268073075. The cubic root of 630161 is about 85.7334908024.

Adding to 630161 its reverse (161036), we get a palindrome (791197).

The spelling of 630161 in words is "six hundred thirty thousand, one hundred sixty-one".