38908609 has 4 divisors (see below), whose sum is σ = 39215104. Its totient is φ = 38602116.

The previous prime is 38908603. The next prime is 38908619. The reversal of 38908609 is 90680983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90680983 = 31 ⋅2925193.

It is a cyclic number.

It is not a de Polignac number, because 38908609 - 2³ = 38908601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38908601) 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 in 3 ways as a sum of consecutive naturals, for example, 153057 + ... + 153310.

It is an arithmetic number, because the mean of its divisors is an integer number (9803776).

Almost surely, 2^38908609 is an apocalyptic number.

It is an amenable number.

38908609 is a deficient number, since it is larger than the sum of its proper divisors (306495).

38908609 is a wasteful number, since it uses less digits than its factorization.

38908609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306494.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 38908609 is about 6237.6765706471. The cubic root of 38908609 is about 338.8560429253.

The spelling of 38908609 in words is "thirty-eight million, nine hundred eight thousand, six hundred nine".