39954221 has 2 divisors, whose sum is σ = 39954222. Its totient is φ = 39954220.

The previous prime is 39954217. The next prime is 39954227. The reversal of 39954221 is 12245993.

39954221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 13801225 = 5114^2 + 3715^2 .

It is an emirp because it is prime and its reverse (12245993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39954221 - 2² = 39954217 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39954227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19977110 + 19977111.

It is an arithmetic number, because the mean of its divisors is an integer number (19977111).

Almost surely, 2^39954221 is an apocalyptic number.

It is an amenable number.

39954221 is a deficient number, since it is larger than the sum of its proper divisors (1).

39954221 is an equidigital number, since it uses as much as digits as its factorization.

39954221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 39954221 is about 6320.9351365126. The cubic root of 39954221 is about 341.8646712163.

The spelling of 39954221 in words is "thirty-nine million, nine hundred fifty-four thousand, two hundred twenty-one".