31660960493 has 2 divisors, whose sum is σ = 31660960494. Its totient is φ = 31660960492.

The previous prime is 31660960459. The next prime is 31660960547. The reversal of 31660960493 is 39406906613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24832086724 + 6828873769 = 157582^2 + 82637^2 .

It is an emirp because it is prime and its reverse (39406906613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31660960493 - 2²⁰ = 31659911917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31660960193) 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, 15830480246 + 15830480247.

It is an arithmetic number, because the mean of its divisors is an integer number (15830480247).

Almost surely, 2^31660960493 is an apocalyptic number.

It is an amenable number.

31660960493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31660960493 is an equidigital number, since it uses as much as digits as its factorization.

31660960493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 47.

The spelling of 31660960493 in words is "thirty-one billion, six hundred sixty million, nine hundred sixty thousand, four hundred ninety-three".