31849 has 2 divisors, whose sum is σ = 31850. Its totient is φ = 31848.

The previous prime is 31847. The next prime is 31859. The reversal of 31849 is 94813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27225 + 4624 = 165^2 + 68^2 .

It is a cyclic number.

It is not a de Polignac number, because 31849 - 2¹ = 31847 is a prime.

Together with 31847, it forms a pair of twin primes.

31849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (31847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15924 + 15925.

It is an arithmetic number, because the mean of its divisors is an integer number (15925).

2³¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

31849 is a deficient number, since it is larger than the sum of its proper divisors (1).

31849 is an equidigital number, since it uses as much as digits as its factorization.

31849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 31849 is about 178.4628812947. The cubic root of 31849 is about 31.6980052946.

The spelling of 31849 in words is "thirty-one thousand, eight hundred forty-nine".