38975221 has 2 divisors, whose sum is σ = 38975222. Its totient is φ = 38975220.

The previous prime is 38975207. The next prime is 38975249. The reversal of 38975221 is 12257983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23174596 + 15800625 = 4814^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 38975221 - 2⁹ = 38974709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38975201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19487610 + 19487611.

It is an arithmetic number, because the mean of its divisors is an integer number (19487611).

Almost surely, 2^38975221 is an apocalyptic number.

It is an amenable number.

38975221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38975221 is an equidigital number, since it uses as much as digits as its factorization.

38975221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 38975221 is about 6243.0137754133. The cubic root of 38975221 is about 339.0493078645.

The spelling of 38975221 in words is "thirty-eight million, nine hundred seventy-five thousand, two hundred twenty-one".