31696871 has 2 divisors, whose sum is σ = 31696872. Its totient is φ = 31696870.

The previous prime is 31696843. The next prime is 31696879. The reversal of 31696871 is 17869613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31696871 - 2¹⁰ = 31695847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31696879) 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, 15848435 + 15848436.

It is an arithmetic number, because the mean of its divisors is an integer number (15848436).

Almost surely, 2^31696871 is an apocalyptic number.

31696871 is a deficient number, since it is larger than the sum of its proper divisors (1).

31696871 is an equidigital number, since it uses as much as digits as its factorization.

31696871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 31696871 is about 5629.9974245110. The cubic root of 31696871 is about 316.4745546970.

The spelling of 31696871 in words is "thirty-one million, six hundred ninety-six thousand, eight hundred seventy-one".