630869 has 4 divisors (see below), whose sum is σ = 632460. Its totient is φ = 629280.

The previous prime is 630863. The next prime is 630871. The reversal of 630869 is 968036.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 508369 = 350^2 + 713^2 .

It is a cyclic number.

It is not a de Polignac number, because 630869 - 2⁸ = 630613 is a prime.

It is a super-2 number, since 2×630869² = 795991390322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630863) 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, 347 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (158115).

2⁶³⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

630869 is a deficient number, since it is larger than the sum of its proper divisors (1591).

630869 is an equidigital number, since it uses as much as digits as its factorization.

630869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 630869 is about 794.2726232220. The cubic root of 630869 is about 85.7655866178.

The spelling of 630869 in words is "six hundred thirty thousand, eight hundred sixty-nine".