31728682793 has 2 divisors, whose sum is σ = 31728682794. Its totient is φ = 31728682792.

The previous prime is 31728682759. The next prime is 31728682823. The reversal of 31728682793 is 39728682713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26816355049 + 4912327744 = 163757^2 + 70088^2 .

It is a cyclic number.

It is not a de Polignac number, because 31728682793 - 2¹² = 31728678697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31728682093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15864341396 + 15864341397.

It is an arithmetic number, because the mean of its divisors is an integer number (15864341397).

Almost surely, 2^31728682793 is an apocalyptic number.

It is an amenable number.

31728682793 is a deficient number, since it is larger than the sum of its proper divisors (1).

31728682793 is an equidigital number, since it uses as much as digits as its factorization.

31728682793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The spelling of 31728682793 in words is "thirty-one billion, seven hundred twenty-eight million, six hundred eighty-two thousand, seven hundred ninety-three".