27699139 has 4 divisors (see below), whose sum is σ = 29829856. Its totient is φ = 25568424.

The previous prime is 27699127. The next prime is 27699157. The reversal of 27699139 is 93199672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27699139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27699109) 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, 1065339 + ... + 1065364.

It is an arithmetic number, because the mean of its divisors is an integer number (7457464).

Almost surely, 2^27699139 is an apocalyptic number.

27699139 is a deficient number, since it is larger than the sum of its proper divisors (2130717).

27699139 is a wasteful number, since it uses less digits than its factorization.

27699139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130716.

The product of its digits is 183708, while the sum is 46.

The square root of 27699139 is about 5262.9971499137. The cubic root of 27699139 is about 302.5673697365.

The spelling of 27699139 in words is "twenty-seven million, six hundred ninety-nine thousand, one hundred thirty-nine".