31828943 has 2 divisors, whose sum is σ = 31828944. Its totient is φ = 31828942.

The previous prime is 31828931. The next prime is 31828963. The reversal of 31828943 is 34982813.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31828943 is a prime.

It is a super-2 number, since 2×31828943² = 2026163224994498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31828897 and 31828906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31828903) 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, 15914471 + 15914472.

It is an arithmetic number, because the mean of its divisors is an integer number (15914472).

Almost surely, 2^31828943 is an apocalyptic number.

31828943 is a deficient number, since it is larger than the sum of its proper divisors (1).

31828943 is an equidigital number, since it uses as much as digits as its factorization.

31828943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 31828943 is about 5641.7145443562. The cubic root of 31828943 is about 316.9134992716.

The spelling of 31828943 in words is "thirty-one million, eight hundred twenty-eight thousand, nine hundred forty-three".