31396933 has 2 divisors, whose sum is σ = 31396934. Its totient is φ = 31396932.

The previous prime is 31396921. The next prime is 31396957. The reversal of 31396933 is 33969313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 10903204 = 4527^2 + 3302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31396933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31396892 and 31396901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31396913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15698466 + 15698467.

It is an arithmetic number, because the mean of its divisors is an integer number (15698467).

Almost surely, 2^31396933 is an apocalyptic number.

It is an amenable number.

31396933 is a deficient number, since it is larger than the sum of its proper divisors (1).

31396933 is an equidigital number, since it uses as much as digits as its factorization.

31396933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366, while the sum is 37.

The square root of 31396933 is about 5603.2966189557. The cubic root of 31396933 is about 315.4731547219.

The spelling of 31396933 in words is "thirty-one million, three hundred ninety-six thousand, nine hundred thirty-three".