31668607 has 2 divisors, whose sum is σ = 31668608. Its totient is φ = 31668606.

The previous prime is 31668583. The next prime is 31668653. The reversal of 31668607 is 70686613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31668607 - 2⁷ = 31668479 is a prime.

It is a super-3 number, since 3×31668607³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31668697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15834303 + 15834304.

It is an arithmetic number, because the mean of its divisors is an integer number (15834304).

Almost surely, 2^31668607 is an apocalyptic number.

31668607 is a deficient number, since it is larger than the sum of its proper divisors (1).

31668607 is an equidigital number, since it uses as much as digits as its factorization.

31668607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 31668607 is about 5627.4867392114. The cubic root of 31668607 is about 316.3804602692.

The spelling of 31668607 in words is "thirty-one million, six hundred sixty-eight thousand, six hundred seven".