672389 has 4 divisors (see below), whose sum is σ = 674220. Its totient is φ = 670560.

The previous prime is 672379. The next prime is 672439. The reversal of 672389 is 983276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 84100 = 767^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672389 is a prime.

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

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 (672349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (168555).

2⁶⁷²³⁸⁹ is an apocalyptic number.

It is an amenable number.

672389 is a deficient number, since it is larger than the sum of its proper divisors (1831).

672389 is a wasteful number, since it uses less digits than its factorization.

672389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830.

The product of its digits is 18144, while the sum is 35.

The square root of 672389 is about 819.9932926555. The cubic root of 672389 is about 87.6072806581.

The spelling of 672389 in words is "six hundred seventy-two thousand, three hundred eighty-nine".