31694 has 16 divisors (see below), whose sum is σ = 54432. Its totient is φ = 13728.

The previous prime is 31687. The next prime is 31699. The reversal of 31694 is 49613.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31694.

It is not an unprimeable number, because it can be changed into a prime (31699) 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 7 ways as a sum of consecutive naturals, for example, 572 + ... + 624.

It is an arithmetic number, because the mean of its divisors is an integer number (3402).

2³¹⁶⁹⁴ is an apocalyptic number.

31694 is a deficient number, since it is larger than the sum of its proper divisors (22738).

31694 is a wasteful number, since it uses less digits than its factorization.

31694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91.

The product of its digits is 648, while the sum is 23.

The square root of 31694 is about 178.0280876716. The cubic root of 31694 is about 31.6464999328.

31694 divided by its sum of digits (23) gives a triangular number (1378 = T₅₂).

The spelling of 31694 in words is "thirty-one thousand, six hundred ninety-four".