31748117 has 2 divisors, whose sum is σ = 31748118. Its totient is φ = 31748116.

The previous prime is 31748111. The next prime is 31748131. The reversal of 31748117 is 71184713.

It is a happy number.

31748117 is nontrivially palindromic in base 15.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 2436721 = 5414^2 + 1561^2 .

It is an emirp because it is prime and its reverse (71184713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31748117 - 2⁶ = 31748053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31748111) 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 as a sum of consecutive naturals, namely, 15874058 + 15874059.

It is an arithmetic number, because the mean of its divisors is an integer number (15874059).

Almost surely, 2^31748117 is an apocalyptic number.

It is an amenable number.

31748117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31748117 is an equidigital number, since it uses as much as digits as its factorization.

31748117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 32.

The square root of 31748117 is about 5634.5467430841. The cubic root of 31748117 is about 316.6450165562.

The spelling of 31748117 in words is "thirty-one million, seven hundred forty-eight thousand, one hundred seventeen".