31683361 has 2 divisors, whose sum is σ = 31683362. Its totient is φ = 31683360.

The previous prime is 31683343. The next prime is 31683367. The reversal of 31683361 is 16338613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 6533136 = 5015^2 + 2556^2 .

It is a cyclic number.

It is not a de Polignac number, because 31683361 - 2⁵ = 31683329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31683367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15841680 + 15841681.

It is an arithmetic number, because the mean of its divisors is an integer number (15841681).

Almost surely, 2^31683361 is an apocalyptic number.

It is an amenable number.

31683361 is a deficient number, since it is larger than the sum of its proper divisors (1).

31683361 is an equidigital number, since it uses as much as digits as its factorization.

31683361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 31683361 is about 5628.7974737061. The cubic root of 31683361 is about 316.4295851812.

The spelling of 31683361 in words is "thirty-one million, six hundred eighty-three thousand, three hundred sixty-one".