31946533321897 has 2 divisors, whose sum is σ = 31946533321898. Its totient is φ = 31946533321896.

The previous prime is 31946533321883. The next prime is 31946533321909. The reversal of 31946533321897 is 79812333564913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18781094368656 + 13165438953241 = 4333716^2 + 3628421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31946533321897 is a prime.

It is not a weakly prime, because it can be changed into another prime (31946533321867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15973266660948 + 15973266660949.

It is an arithmetic number, because the mean of its divisors is an integer number (15973266660949).

Almost surely, 2^{31946533321897} is an apocalyptic number.

It is an amenable number.

31946533321897 is a deficient number, since it is larger than the sum of its proper divisors (1).

31946533321897 is an equidigital number, since it uses as much as digits as its factorization.

31946533321897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88179840, while the sum is 64.

The spelling of 31946533321897 in words is "thirty-one trillion, nine hundred forty-six billion, five hundred thirty-three million, three hundred twenty-one thousand, eight hundred ninety-seven".