31867 has 4 divisors (see below), whose sum is σ = 34776. Its totient is φ = 28960.

The previous prime is 31859. The next prime is 31873. The reversal of 31867 is 76813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76813 = 11 ⋅6983.

It is a cyclic number.

It is not a de Polignac number, because 31867 - 2³ = 31859 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (31817) 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 3 ways as a sum of consecutive naturals, for example, 1438 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (8694).

2³¹⁸⁶⁷ is an apocalyptic number.

31867 is a deficient number, since it is larger than the sum of its proper divisors (2909).

31867 is a wasteful number, since it uses less digits than its factorization.

31867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its digits is 1008, while the sum is 25.

The square root of 31867 is about 178.5133048263. The cubic root of 31867 is about 31.7039757243.

It can be divided in two parts, 31 and 867, that added together give a palindrome (898).

The spelling of 31867 in words is "thirty-one thousand, eight hundred sixty-seven".