38774221 has 2 divisors, whose sum is σ = 38774222. Its totient is φ = 38774220.

The previous prime is 38774213. The next prime is 38774257. The reversal of 38774221 is 12247783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36844900 + 1929321 = 6070^2 + 1389^2 .

It is an emirp because it is prime and its reverse (12247783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38774221 - 2³ = 38774213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38774291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19387110 + 19387111.

It is an arithmetic number, because the mean of its divisors is an integer number (19387111).

Almost surely, 2^38774221 is an apocalyptic number.

It is an amenable number.

38774221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38774221 is an equidigital number, since it uses as much as digits as its factorization.

38774221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 38774221 is about 6226.8949726168. The cubic root of 38774221 is about 338.4654634226.

The spelling of 38774221 in words is "thirty-eight million, seven hundred seventy-four thousand, two hundred twenty-one".