38604721 has 2 divisors, whose sum is σ = 38604722. Its totient is φ = 38604720.

The previous prime is 38604697. The next prime is 38604733. The reversal of 38604721 is 12740683.

38604721 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., 27415696 + 11189025 = 5236^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 38604721 - 2⁵ = 38604689 is a prime.

It is not a weakly prime, because it can be changed into another prime (38604781) 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, 19302360 + 19302361.

It is an arithmetic number, because the mean of its divisors is an integer number (19302361).

Almost surely, 2^38604721 is an apocalyptic number.

It is an amenable number.

38604721 is a deficient number, since it is larger than the sum of its proper divisors (1).

38604721 is an equidigital number, since it uses as much as digits as its factorization.

38604721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 38604721 is about 6213.2697511053. The cubic root of 38604721 is about 337.9715468036.

The spelling of 38604721 in words is "thirty-eight million, six hundred four thousand, seven hundred twenty-one".