27389999 has 20 divisors (see below), whose sum is σ = 34158864. Its totient is φ = 21513024.

The previous prime is 27389993. The next prime is 27390023. The reversal of 27389999 is 99998372.

It is not a de Polignac number, because 27389999 - 2²⁰ = 26341423 is a prime.

It is a Duffinian number.

27389999 is a modest number, since divided by 9999 gives 2738 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27389993) 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 19 ways as a sum of consecutive naturals, for example, 199859 + ... + 199995.

Almost surely, 2^27389999 is an apocalyptic number.

27389999 is a deficient number, since it is larger than the sum of its proper divisors (6768865).

27389999 is an frugal number, since it uses more digits than its factorization.

27389999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 157 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 56.

The square root of 27389999 is about 5233.5455477143. The cubic root of 27389999 is about 301.4375413213.

The spelling of 27389999 in words is "twenty-seven million, three hundred eighty-nine thousand, nine hundred ninety-nine".