31974457 has 2 divisors, whose sum is σ = 31974458. Its totient is φ = 31974456.

The previous prime is 31974451. The next prime is 31974469. The reversal of 31974457 is 75447913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21631801 + 10342656 = 4651^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 31974457 - 2⁷ = 31974329 is a prime.

It is not a weakly prime, because it can be changed into another prime (31974451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15987228 + 15987229.

It is an arithmetic number, because the mean of its divisors is an integer number (15987229).

Almost surely, 2^31974457 is an apocalyptic number.

It is an amenable number.

31974457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31974457 is an equidigital number, since it uses as much as digits as its factorization.

31974457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 31974457 is about 5654.5960952132. The cubic root of 31974457 is about 317.3957150222.

The spelling of 31974457 in words is "thirty-one million, nine hundred seventy-four thousand, four hundred fifty-seven".