38221649 has 2 divisors, whose sum is σ = 38221650. Its totient is φ = 38221648.

The previous prime is 38221637. The next prime is 38221657. The reversal of 38221649 is 94612283.

38221649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 18861649 = 4400^2 + 4343^2 .

It is an emirp because it is prime and its reverse (94612283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38221649 - 2²⁴ = 21444433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38221609) 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, 19110824 + 19110825.

It is an arithmetic number, because the mean of its divisors is an integer number (19110825).

Almost surely, 2^38221649 is an apocalyptic number.

It is an amenable number.

38221649 is a deficient number, since it is larger than the sum of its proper divisors (1).

38221649 is an equidigital number, since it uses as much as digits as its factorization.

38221649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 38221649 is about 6182.3659710502. The cubic root of 38221649 is about 336.8499392071.

The spelling of 38221649 in words is "thirty-eight million, two hundred twenty-one thousand, six hundred forty-nine".