672689 has 4 divisors (see below), whose sum is σ = 678756. Its totient is φ = 666624.

The previous prime is 672667. The next prime is 672703. The reversal of 672689 is 986276.

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 8464 + 664225 = 92^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 672689 - 2¹⁶ = 607153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672629) 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, 2864 + ... + 3089.

It is an arithmetic number, because the mean of its divisors is an integer number (169689).

2⁶⁷²⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

672689 is a deficient number, since it is larger than the sum of its proper divisors (6067).

672689 is a wasteful number, since it uses less digits than its factorization.

672689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066.

The product of its digits is 36288, while the sum is 38.

The square root of 672689 is about 820.1762005813. The cubic root of 672689 is about 87.6203079763.

The spelling of 672689 in words is "six hundred seventy-two thousand, six hundred eighty-nine".