38724913 has 2 divisors, whose sum is σ = 38724914. Its totient is φ = 38724912.

The previous prime is 38724911. The next prime is 38724923. The reversal of 38724913 is 31942783.

38724913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26697889 + 12027024 = 5167^2 + 3468^2 .

It is a cyclic number.

It is not a de Polignac number, because 38724913 - 2¹ = 38724911 is a prime.

Together with 38724911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38724911) 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, 19362456 + 19362457.

It is an arithmetic number, because the mean of its divisors is an integer number (19362457).

Almost surely, 2^38724913 is an apocalyptic number.

It is an amenable number.

38724913 is a deficient number, since it is larger than the sum of its proper divisors (1).

38724913 is an equidigital number, since it uses as much as digits as its factorization.

38724913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 38724913 is about 6222.9344364215. The cubic root of 38724913 is about 338.3219304776.

The spelling of 38724913 in words is "thirty-eight million, seven hundred twenty-four thousand, nine hundred thirteen".