27999359 has 4 divisors (see below), whose sum is σ = 28155960. Its totient is φ = 27842760.

The previous prime is 27999353. The next prime is 27999371. The reversal of 27999359 is 95399972.

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

It is a cyclic number.

It is not a de Polignac number, because 27999359 - 2¹⁶ = 27933823 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 27999359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27999353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78032 + ... + 78389.

It is an arithmetic number, because the mean of its divisors is an integer number (7038990).

Almost surely, 2^27999359 is an apocalyptic number.

27999359 is a deficient number, since it is larger than the sum of its proper divisors (156601).

27999359 is a wasteful number, since it uses less digits than its factorization.

27999359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156600.

The product of its digits is 1377810, while the sum is 53.

The square root of 27999359 is about 5291.4420529757. The cubic root of 27999359 is about 303.6565799633.

The spelling of 27999359 in words is "twenty-seven million, nine hundred ninety-nine thousand, three hundred fifty-nine".