38581321 has 2 divisors, whose sum is σ = 38581322. Its totient is φ = 38581320.

The previous prime is 38581289. The next prime is 38581331. The reversal of 38581321 is 12318583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 881721 = 6140^2 + 939^2 .

It is an emirp because it is prime and its reverse (12318583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38581321 - 2⁵ = 38581289 is a prime.

It is not a weakly prime, because it can be changed into another prime (38581331) 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, 19290660 + 19290661.

It is an arithmetic number, because the mean of its divisors is an integer number (19290661).

Almost surely, 2^38581321 is an apocalyptic number.

It is an amenable number.

38581321 is a deficient number, since it is larger than the sum of its proper divisors (1).

38581321 is an equidigital number, since it uses as much as digits as its factorization.

38581321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 38581321 is about 6211.3863991866. The cubic root of 38581321 is about 337.9032465852.

The spelling of 38581321 in words is "thirty-eight million, five hundred eighty-one thousand, three hundred twenty-one".