630431 has 4 divisors (see below), whose sum is σ = 652200. Its totient is φ = 608664.

The previous prime is 630391. The next prime is 630433. The reversal of 630431 is 134036.

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 630431 - 2¹⁸ = 368287 is a prime.

It is a super-2 number, since 2×630431² = 794886491522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630433) 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, 10841 + ... + 10898.

It is an arithmetic number, because the mean of its divisors is an integer number (163050).

2⁶³⁰⁴³¹ is an apocalyptic number.

630431 is a deficient number, since it is larger than the sum of its proper divisors (21769).

630431 is a wasteful number, since it uses less digits than its factorization.

630431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21768.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 630431 is about 793.9968513791. The cubic root of 630431 is about 85.7457335665.

Adding to 630431 its reverse (134036), we get a palindrome (764467).

The spelling of 630431 in words is "six hundred thirty thousand, four hundred thirty-one".