38864809 has 2 divisors, whose sum is σ = 38864810. Its totient is φ = 38864808.

The previous prime is 38864807. The next prime is 38864909. The reversal of 38864809 is 90846883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 15776784 = 4805^2 + 3972^2 .

It is a cyclic number.

It is not a de Polignac number, because 38864809 - 2¹ = 38864807 is a prime.

Together with 38864807, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38864807) 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, 19432404 + 19432405.

It is an arithmetic number, because the mean of its divisors is an integer number (19432405).

Almost surely, 2^38864809 is an apocalyptic number.

It is an amenable number.

38864809 is a deficient number, since it is larger than the sum of its proper divisors (1).

38864809 is an equidigital number, since it uses as much as digits as its factorization.

38864809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 38864809 is about 6234.1646593589. The cubic root of 38864809 is about 338.7288434203.

The spelling of 38864809 in words is "thirty-eight million, eight hundred sixty-four thousand, eight hundred nine".