38308513 has 2 divisors, whose sum is σ = 38308514. Its totient is φ = 38308512.

The previous prime is 38308511. The next prime is 38308519. The reversal of 38308513 is 31580383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22212369 + 16096144 = 4713^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 38308513 - 2¹ = 38308511 is a prime.

Together with 38308511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38308511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19154256 + 19154257.

It is an arithmetic number, because the mean of its divisors is an integer number (19154257).

Almost surely, 2^38308513 is an apocalyptic number.

It is an amenable number.

38308513 is a deficient number, since it is larger than the sum of its proper divisors (1).

38308513 is an equidigital number, since it uses as much as digits as its factorization.

38308513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 38308513 is about 6189.3871263640. The cubic root of 38308513 is about 337.1049255471.

Adding to 38308513 its reverse (31580383), we get a palindrome (69888896).

The spelling of 38308513 in words is "thirty-eight million, three hundred eight thousand, five hundred thirteen".