38330821 has 2 divisors, whose sum is σ = 38330822. Its totient is φ = 38330820.

The previous prime is 38330807. The next prime is 38330827. The reversal of 38330821 is 12803383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24117921 + 14212900 = 4911^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 38330821 - 2⁷ = 38330693 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38330821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38330827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19165410 + 19165411.

It is an arithmetic number, because the mean of its divisors is an integer number (19165411).

Almost surely, 2^38330821 is an apocalyptic number.

It is an amenable number.

38330821 is a deficient number, since it is larger than the sum of its proper divisors (1).

38330821 is an equidigital number, since it uses as much as digits as its factorization.

38330821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 38330821 is about 6191.1889811247. The cubic root of 38330821 is about 337.1703477108.

The spelling of 38330821 in words is "thirty-eight million, three hundred thirty thousand, eight hundred twenty-one".