138054909 has 8 divisors (see below), whose sum is σ = 194901120. Its totient is φ = 86622656.

The previous prime is 138054883. The next prime is 138054911. The reversal of 138054909 is 909450831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138054909 - 2¹³ = 138046717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138054989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353429 + ... + 1353530.

It is an arithmetic number, because the mean of its divisors is an integer number (24362640).

Almost surely, 2^138054909 is an apocalyptic number.

It is an amenable number.

138054909 is a deficient number, since it is larger than the sum of its proper divisors (56846211).

138054909 is a wasteful number, since it uses less digits than its factorization.

138054909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706979.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 138054909 is about 11749.6769742832. The cubic root of 138054909 is about 516.8334549048.

The spelling of 138054909 in words is "one hundred thirty-eight million, fifty-four thousand, nine hundred nine".