38864521 has 2 divisors, whose sum is σ = 38864522. Its totient is φ = 38864520.

The previous prime is 38864509. The next prime is 38864587. The reversal of 38864521 is 12546883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21724921 + 17139600 = 4661^2 + 4140^2 .

It is an emirp because it is prime and its reverse (12546883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38864521 - 2⁹ = 38864009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38864591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19432260 + 19432261.

It is an arithmetic number, because the mean of its divisors is an integer number (19432261).

Almost surely, 2^38864521 is an apocalyptic number.

It is an amenable number.

38864521 is a deficient number, since it is larger than the sum of its proper divisors (1).

38864521 is an equidigital number, since it uses as much as digits as its factorization.

38864521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 38864521 is about 6234.1415607925. The cubic root of 38864521 is about 338.7280067238.

The spelling of 38864521 in words is "thirty-eight million, eight hundred sixty-four thousand, five hundred twenty-one".