27929169 has 6 divisors (see below), whose sum is σ = 40342146. Its totient is φ = 18619440.

The previous prime is 27929149. The next prime is 27929197. The reversal of 27929169 is 96192972.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 5461569 = 4740^2 + 2337^2 .

It is not a de Polignac number, because 27929169 - 2⁵ = 27929137 is a prime.

It is a super-2 number, since 2×27929169² = 1560076962061122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27929129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1551612 + ... + 1551629.

It is an arithmetic number, because the mean of its divisors is an integer number (6723691).

Almost surely, 2^27929169 is an apocalyptic number.

It is an amenable number.

27929169 is a deficient number, since it is larger than the sum of its proper divisors (12412977).

27929169 is a wasteful number, since it uses less digits than its factorization.

27929169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103247 (or 3103244 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 27929169 is about 5284.8054836484. The cubic root of 27929169 is about 303.4026278378.

The spelling of 27929169 in words is "twenty-seven million, nine hundred twenty-nine thousand, one hundred sixty-nine".