38394000221 has 2 divisors, whose sum is σ = 38394000222. Its totient is φ = 38394000220.

The previous prime is 38394000209. The next prime is 38394000241. The reversal of 38394000221 is 12200049383.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38264836996 + 129163225 = 195614^2 + 11365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38394000221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38394000241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19197000110 + 19197000111.

It is an arithmetic number, because the mean of its divisors is an integer number (19197000111).

Almost surely, 2^38394000221 is an apocalyptic number.

It is an amenable number.

38394000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38394000221 is an equidigital number, since it uses as much as digits as its factorization.

38394000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 38394000221 in words is "thirty-eight billion, three hundred ninety-four million, two hundred twenty-one", and thus it is an aban number.