38938121 has 2 divisors, whose sum is σ = 38938122. Its totient is φ = 38938120.

The previous prime is 38938117. The next prime is 38938147. The reversal of 38938121 is 12183983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 10465225 = 5336^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 38938121 - 2² = 38938117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38938111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19469060 + 19469061.

It is an arithmetic number, because the mean of its divisors is an integer number (19469061).

Almost surely, 2^38938121 is an apocalyptic number.

It is an amenable number.

38938121 is a deficient number, since it is larger than the sum of its proper divisors (1).

38938121 is an equidigital number, since it uses as much as digits as its factorization.

38938121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 38938121 is about 6240.0417466552. The cubic root of 38938121 is about 338.9416948539.

The spelling of 38938121 in words is "thirty-eight million, nine hundred thirty-eight thousand, one hundred twenty-one".