31636673 has 2 divisors, whose sum is σ = 31636674. Its totient is φ = 31636672.

The previous prime is 31636637. The next prime is 31636679. The reversal of 31636673 is 37663613.

Together with previous prime (31636637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31494544 + 142129 = 5612^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 31636673 - 2¹² = 31632577 is a prime.

It is not a weakly prime, because it can be changed into another prime (31636679) 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, 15818336 + 15818337.

It is an arithmetic number, because the mean of its divisors is an integer number (15818337).

Almost surely, 2^31636673 is an apocalyptic number.

It is an amenable number.

31636673 is a deficient number, since it is larger than the sum of its proper divisors (1).

31636673 is an equidigital number, since it uses as much as digits as its factorization.

31636673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 35.

The square root of 31636673 is about 5624.6487001412. The cubic root of 31636673 is about 316.2740805610.

The spelling of 31636673 in words is "thirty-one million, six hundred thirty-six thousand, six hundred seventy-three".