31974329 has 2 divisors, whose sum is σ = 31974330. Its totient is φ = 31974328.

The previous prime is 31974323. The next prime is 31974337. The reversal of 31974329 is 92347913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 8111104 = 4885^2 + 2848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31974329 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31974292 and 31974301.

It is not a weakly prime, because it can be changed into another prime (31974323) 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, 15987164 + 15987165.

It is an arithmetic number, because the mean of its divisors is an integer number (15987165).

Almost surely, 2^31974329 is an apocalyptic number.

It is an amenable number.

31974329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31974329 is an equidigital number, since it uses as much as digits as its factorization.

31974329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 31974329 is about 5654.5847769752. The cubic root of 31974329 is about 317.3952914892.

The spelling of 31974329 in words is "thirty-one million, nine hundred seventy-four thousand, three hundred twenty-nine".