669231 has 24 divisors (see below), whose sum is σ = 1044576. Its totient is φ = 411840.

The previous prime is 669181. The next prime is 669241. The reversal of 669231 is 132966.

It is a happy number.

It is not a de Polignac number, because 669231 - 2⁶ = 669167 is a prime.

It is a super-2 number, since 2×669231² = 895740262722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 669195 and 669204.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669231.

It is not an unprimeable number, because it can be changed into a prime (669241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10941 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (43524).

2⁶⁶⁹²³¹ is an apocalyptic number.

669231 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

669231 is a deficient number, since it is larger than the sum of its proper divisors (375345).

669231 is a wasteful number, since it uses less digits than its factorization.

669231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 140 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 669231 is about 818.0654008085. The cubic root of 669231 is about 87.4699107426.

It can be divided in two parts, 669 and 231, that added together give a square (900 = 30²).

The spelling of 669231 in words is "six hundred sixty-nine thousand, two hundred thirty-one".