31493 has 8 divisors (see below), whose sum is σ = 39360. Its totient is φ = 24480.

The previous prime is 31489. The next prime is 31511. The reversal of 31493 is 39413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31493 - 2² = 31489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

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 31493.

It is not an unprimeable number, because it can be changed into a prime (31193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128 + ... + 281.

It is an arithmetic number, because the mean of its divisors is an integer number (4920).

2³¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

31493 is a deficient number, since it is larger than the sum of its proper divisors (7867).

31493 is a wasteful number, since it uses less digits than its factorization.

31493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427.

The product of its digits is 324, while the sum is 20.

The square root of 31493 is about 177.4626721314. The cubic root of 31493 is about 31.5794584225.

Adding to 31493 its sum of digits (20), we get a palindrome (31513).

The spelling of 31493 in words is "thirty-one thousand, four hundred ninety-three".