27144979 has 4 divisors (see below), whose sum is σ = 27227320. Its totient is φ = 27062640.

The previous prime is 27144967. The next prime is 27145003. The reversal of 27144979 is 97944172.

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 27144979 - 2⁵ = 27144947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27144919) 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 3 ways as a sum of consecutive naturals, for example, 40674 + ... + 41335.

It is an arithmetic number, because the mean of its divisors is an integer number (6806830).

Almost surely, 2^27144979 is an apocalyptic number.

27144979 is a deficient number, since it is larger than the sum of its proper divisors (82341).

27144979 is an equidigital number, since it uses as much as digits as its factorization.

27144979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82340.

The product of its digits is 127008, while the sum is 43.

The square root of 27144979 is about 5210.0843563228. The cubic root of 27144979 is about 300.5360010319.

The spelling of 27144979 in words is "twenty-seven million, one hundred forty-four thousand, nine hundred seventy-nine".