38648521 has 2 divisors, whose sum is σ = 38648522. Its totient is φ = 38648520.

The previous prime is 38648509. The next prime is 38648539. The reversal of 38648521 is 12584683.

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., 33177600 + 5470921 = 5760^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 38648521 - 2²¹ = 36551369 is a prime.

It is not a weakly prime, because it can be changed into another prime (38648581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19324260 + 19324261.

It is an arithmetic number, because the mean of its divisors is an integer number (19324261).

Almost surely, 2^38648521 is an apocalyptic number.

It is an amenable number.

38648521 is a deficient number, since it is larger than the sum of its proper divisors (1).

38648521 is an equidigital number, since it uses as much as digits as its factorization.

38648521 is an evil number, because the sum of its binary digits is even.

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

The square root of 38648521 is about 6216.7934660884. The cubic root of 38648521 is about 338.0993166589.

The spelling of 38648521 in words is "thirty-eight million, six hundred forty-eight thousand, five hundred twenty-one".