630923 has 4 divisors (see below), whose sum is σ = 641328. Its totient is φ = 620520.

The previous prime is 630919. The next prime is 630941. The reversal of 630923 is 329036.

It is a happy number.

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 630923 - 2² = 630919 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (630023) 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, 5111 + ... + 5232.

It is an arithmetic number, because the mean of its divisors is an integer number (160332).

2⁶³⁰⁹²³ is an apocalyptic number.

630923 is a deficient number, since it is larger than the sum of its proper divisors (10405).

630923 is a wasteful number, since it uses less digits than its factorization.

630923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 630923 is about 794.3066158607. The cubic root of 630923 is about 85.7680336179.

Adding to 630923 its reverse (329036), we get a palindrome (959959).

The spelling of 630923 in words is "six hundred thirty thousand, nine hundred twenty-three".