672985 has 4 divisors (see below), whose sum is σ = 807588. Its totient is φ = 538384.

The previous prime is 672983. The next prime is 673019. The reversal of 672985 is 589276.

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 123904 + 549081 = 352^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 672985 - 2¹ = 672983 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672983) 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, 67294 + ... + 67303.

It is an arithmetic number, because the mean of its divisors is an integer number (201897).

2⁶⁷²⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

672985 is a deficient number, since it is larger than the sum of its proper divisors (134603).

672985 is a wasteful number, since it uses less digits than its factorization.

672985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134602.

The product of its digits is 30240, while the sum is 37.

The square root of 672985 is about 820.3566297654. The cubic root of 672985 is about 87.6331578014.

The spelling of 672985 in words is "six hundred seventy-two thousand, nine hundred eighty-five".