31193682997 has 2 divisors, whose sum is σ = 31193682998. Its totient is φ = 31193682996.

The previous prime is 31193682983. The next prime is 31193683049. The reversal of 31193682997 is 79928639113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25229827921 + 5963855076 = 158839^2 + 77226^2 .

It is an emirp because it is prime and its reverse (79928639113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31193682997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31193682917) 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, 15596841498 + 15596841499.

It is an arithmetic number, because the mean of its divisors is an integer number (15596841499).

Almost surely, 2^31193682997 is an apocalyptic number.

It is an amenable number.

31193682997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31193682997 is an equidigital number, since it uses as much as digits as its factorization.

31193682997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The spelling of 31193682997 in words is "thirty-one billion, one hundred ninety-three million, six hundred eighty-two thousand, nine hundred ninety-seven".