27439969 has 4 divisors (see below), whose sum is σ = 27451396. Its totient is φ = 27428544.

The previous prime is 27439961. The next prime is 27439999. The reversal of 27439969 is 96993472.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5349969 + 22090000 = 2313^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 27439969 - 2³ = 27439961 is a prime.

It is a super-2 number, since 2×27439969² = 1505903797441922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27439961) 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, 564 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (6862849).

Almost surely, 2^27439969 is an apocalyptic number.

It is an amenable number.

27439969 is a deficient number, since it is larger than the sum of its proper divisors (11427).

27439969 is an equidigital number, since it uses as much as digits as its factorization.

27439969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11426.

The product of its digits is 734832, while the sum is 49.

The square root of 27439969 is about 5238.3173825189. The cubic root of 27439969 is about 301.6207430203.

The spelling of 27439969 in words is "twenty-seven million, four hundred thirty-nine thousand, nine hundred sixty-nine".