38609509 has 2 divisors, whose sum is σ = 38609510. Its totient is φ = 38609508.

The previous prime is 38609497. The next prime is 38609561. The reversal of 38609509 is 90590683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 2873025 = 5978^2 + 1695^2 .

It is an emirp because it is prime and its reverse (90590683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38609509 - 2¹¹ = 38607461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38609579) 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, 19304754 + 19304755.

It is an arithmetic number, because the mean of its divisors is an integer number (19304755).

Almost surely, 2^38609509 is an apocalyptic number.

It is an amenable number.

38609509 is a deficient number, since it is larger than the sum of its proper divisors (1).

38609509 is an equidigital number, since it uses as much as digits as its factorization.

38609509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 38609509 is about 6213.6550435311. The cubic root of 38609509 is about 337.9855186774.

The spelling of 38609509 in words is "thirty-eight million, six hundred nine thousand, five hundred nine".