38749609 has 4 divisors (see below), whose sum is σ = 39105220. Its totient is φ = 38394000.

The previous prime is 38749553. The next prime is 38749637. The reversal of 38749609 is 90694783.

38749609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11155600 + 27594009 = 3340^2 + 5253^2 .

It is a cyclic number.

It is not a de Polignac number, because 38749609 - 2¹¹ = 38747561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38749649) 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 in 3 ways as a sum of consecutive naturals, for example, 177642 + ... + 177859.

It is an arithmetic number, because the mean of its divisors is an integer number (9776305).

Almost surely, 2^38749609 is an apocalyptic number.

It is an amenable number.

38749609 is a deficient number, since it is larger than the sum of its proper divisors (355611).

38749609 is a wasteful number, since it uses less digits than its factorization.

38749609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355610.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 38749609 is about 6224.9183930394. The cubic root of 38749609 is about 338.3938344300.

The spelling of 38749609 in words is "thirty-eight million, seven hundred forty-nine thousand, six hundred nine".