673881 has 16 divisors (see below), whose sum is σ = 995904. Its totient is φ = 402624.

The previous prime is 673879. The next prime is 673891. The reversal of 673881 is 188376.

It is not a de Polignac number, because 673881 - 2¹ = 673879 is a prime.

It is a super-2 number, since 2×673881² = 908231204322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (673801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1210 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2⁶⁷³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

673881 is a deficient number, since it is larger than the sum of its proper divisors (322023).

673881 is a wasteful number, since it uses less digits than its factorization.

673881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its digits is 8064, while the sum is 33.

The square root of 673881 is about 820.9025520730. The cubic root of 673881 is about 87.6720316192.

The spelling of 673881 in words is "six hundred seventy-three thousand, eight hundred eighty-one".