630523 has 2 divisors, whose sum is σ = 630524. Its totient is φ = 630522.

The previous prime is 630521. The next prime is 630529. The reversal of 630523 is 325036.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 630523 - 2¹ = 630521 is a prime.

Together with 630521, it forms a pair of twin primes.

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

It is a self number, because there is not a number n which added to its sum of digits gives 630523.

It is not a weakly prime, because it can be changed into another prime (630521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315261 + 315262.

It is an arithmetic number, because the mean of its divisors is an integer number (315262).

2⁶³⁰⁵²³ is an apocalyptic number.

630523 is a deficient number, since it is larger than the sum of its proper divisors (1).

630523 is an equidigital number, since it uses as much as digits as its factorization.

630523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 630523 is about 794.0547840042. The cubic root of 630523 is about 85.7499043765.

Adding to 630523 its reverse (325036), we get a palindrome (955559).

It can be divided in two parts, 6305 and 23, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 630523 in words is "six hundred thirty thousand, five hundred twenty-three".