38538091 has 4 divisors (see below), whose sum is σ = 38674552. Its totient is φ = 38401632.

The previous prime is 38538079. The next prime is 38538121. The reversal of 38538091 is 19083583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19083583 = 23 ⋅829721.

It is a cyclic number.

It is not a de Polignac number, because 38538091 - 2⁹ = 38537579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38538091.

It is not an unprimeable number, because it can be changed into a prime (38538001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67806 + ... + 68371.

It is an arithmetic number, because the mean of its divisors is an integer number (9668638).

Almost surely, 2^38538091 is an apocalyptic number.

38538091 is a deficient number, since it is larger than the sum of its proper divisors (136461).

38538091 is a wasteful number, since it uses less digits than its factorization.

38538091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136460.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 38538091 is about 6207.9055244100. The cubic root of 38538091 is about 337.7769936364.

The spelling of 38538091 in words is "thirty-eight million, five hundred thirty-eight thousand, ninety-one".