27139389 has 16 divisors (see below), whose sum is σ = 38449920. Its totient is φ = 16994880.

The previous prime is 27139369. The next prime is 27139397. The reversal of 27139389 is 98393172.

It is not a de Polignac number, because 27139389 - 2¹³ = 27131197 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27139389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27139309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997 + ... + 7434.

It is an arithmetic number, because the mean of its divisors is an integer number (2403120).

Almost surely, 2^27139389 is an apocalyptic number.

27139389 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27139389 is a deficient number, since it is larger than the sum of its proper divisors (11310531).

27139389 is a wasteful number, since it uses less digits than its factorization.

27139389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500.

The product of its digits is 81648, while the sum is 42.

The square root of 27139389 is about 5209.5478690574. The cubic root of 27139389 is about 300.5153696955.

The spelling of 27139389 in words is "twenty-seven million, one hundred thirty-nine thousand, three hundred eighty-nine".