31697111071 has 2 divisors, whose sum is σ = 31697111072. Its totient is φ = 31697111070.

The previous prime is 31697110969. The next prime is 31697111143. The reversal of 31697111071 is 17011179613.

It is a strong prime.

It is an emirp because it is prime and its reverse (17011179613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31697111071 - 2²³ = 31688722463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31697111071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31697117071) 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, 15848555535 + 15848555536.

It is an arithmetic number, because the mean of its divisors is an integer number (15848555536).

Almost surely, 2^31697111071 is an apocalyptic number.

31697111071 is a deficient number, since it is larger than the sum of its proper divisors (1).

31697111071 is an equidigital number, since it uses as much as digits as its factorization.

31697111071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 37.

The spelling of 31697111071 in words is "thirty-one billion, six hundred ninety-seven million, one hundred eleven thousand, seventy-one".