31392080197 has 2 divisors, whose sum is σ = 31392080198. Its totient is φ = 31392080196.

The previous prime is 31392080179. The next prime is 31392080207. The reversal of 31392080197 is 79108029313.

Together with previous prime (31392080179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18201787396 + 13190292801 = 134914^2 + 114849^2 .

It is a cyclic number.

It is not a de Polignac number, because 31392080197 - 2¹⁵ = 31392047429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31392080107) 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, 15696040098 + 15696040099.

It is an arithmetic number, because the mean of its divisors is an integer number (15696040099).

Almost surely, 2^31392080197 is an apocalyptic number.

It is an amenable number.

31392080197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31392080197 is an equidigital number, since it uses as much as digits as its factorization.

31392080197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 31392080197 in words is "thirty-one billion, three hundred ninety-two million, eighty thousand, one hundred ninety-seven".