31706317657669 has 2 divisors, whose sum is σ = 31706317657670. Its totient is φ = 31706317657668.

The previous prime is 31706317657589. The next prime is 31706317657759. The reversal of 31706317657669 is 96675671360713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28717948541569 + 2988369116100 = 5358913^2 + 1728690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31706317657669 is a prime.

It is a super-2 number, since 2×31706317657669² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31706317657969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15853158828834 + 15853158828835.

It is an arithmetic number, because the mean of its divisors is an integer number (15853158828835).

Almost surely, 2^{31706317657669} is an apocalyptic number.

It is an amenable number.

31706317657669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31706317657669 is an equidigital number, since it uses as much as digits as its factorization.

31706317657669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180033840, while the sum is 67.

The spelling of 31706317657669 in words is "thirty-one trillion, seven hundred six billion, three hundred seventeen million, six hundred fifty-seven thousand, six hundred sixty-nine".