31608937 has 2 divisors, whose sum is σ = 31608938. Its totient is φ = 31608936.

The previous prime is 31608917. The next prime is 31608953. The reversal of 31608937 is 73980613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 12503296 = 4371^2 + 3536^2 .

It is a cyclic number.

It is not a de Polignac number, because 31608937 - 2¹⁵ = 31576169 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31608896 and 31608905.

It is not a weakly prime, because it can be changed into another prime (31608917) 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, 15804468 + 15804469.

It is an arithmetic number, because the mean of its divisors is an integer number (15804469).

Almost surely, 2^31608937 is an apocalyptic number.

It is an amenable number.

31608937 is a deficient number, since it is larger than the sum of its proper divisors (1).

31608937 is an equidigital number, since it uses as much as digits as its factorization.

31608937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 31608937 is about 5622.1825833034. The cubic root of 31608937 is about 316.1816272797.

The spelling of 31608937 in words is "thirty-one million, six hundred eight thousand, nine hundred thirty-seven".