31696361 has 2 divisors, whose sum is σ = 31696362. Its totient is φ = 31696360.

The previous prime is 31696339. The next prime is 31696363. The reversal of 31696361 is 16369613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29637136 + 2059225 = 5444^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 31696361 - 2⁶ = 31696297 is a prime.

It is a Sophie Germain prime.

Together with 31696363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1956239 and since 31696361 and 1956239 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31696363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15848180 + 15848181.

It is an arithmetic number, because the mean of its divisors is an integer number (15848181).

Almost surely, 2^31696361 is an apocalyptic number.

It is an amenable number.

31696361 is a deficient number, since it is larger than the sum of its proper divisors (1).

31696361 is an equidigital number, since it uses as much as digits as its factorization.

31696361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 31696361 is about 5629.9521312352. The cubic root of 31696361 is about 316.4728573382.

The spelling of 31696361 in words is "thirty-one million, six hundred ninety-six thousand, three hundred sixty-one".