630983 has 4 divisors (see below), whose sum is σ = 635160. Its totient is φ = 626808.

The previous prime is 630967. The next prime is 630997. The reversal of 630983 is 389036.

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 630983 - 2⁴ = 630967 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630583) 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, 1853 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (158790).

2⁶³⁰⁹⁸³ is an apocalyptic number.

630983 is a deficient number, since it is larger than the sum of its proper divisors (4177).

630983 is a wasteful number, since it uses less digits than its factorization.

630983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 630983 is about 794.3443837530. The cubic root of 630983 is about 85.7707523432.

The spelling of 630983 in words is "six hundred thirty thousand, nine hundred eighty-three".