27980159 has 4 divisors (see below), whose sum is σ = 28193880. Its totient is φ = 27766440.

The previous prime is 27980153. The next prime is 27980201. The reversal of 27980159 is 95108972.

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-27980159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980153) 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, 106664 + ... + 106925.

It is an arithmetic number, because the mean of its divisors is an integer number (7048470).

Almost surely, 2^27980159 is an apocalyptic number.

27980159 is a deficient number, since it is larger than the sum of its proper divisors (213721).

27980159 is a wasteful number, since it uses less digits than its factorization.

27980159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213720.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 27980159 is about 5289.6274916103. The cubic root of 27980159 is about 303.5871552848.

The spelling of 27980159 in words is "twenty-seven million, nine hundred eighty thousand, one hundred fifty-nine".