27439949 has 4 divisors (see below), whose sum is σ = 27459936. Its totient is φ = 27419964.

The previous prime is 27439859. The next prime is 27439961. The reversal of 27439949 is 94993472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27439949 - 2⁸ = 27439693 is a prime.

It is a super-2 number, since 2×27439949² = 1505901602245202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27439999) 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, 7769 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (6864984).

Almost surely, 2^27439949 is an apocalyptic number.

It is an amenable number.

27439949 is a deficient number, since it is larger than the sum of its proper divisors (19987).

27439949 is a wasteful number, since it uses less digits than its factorization.

27439949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19986.

The product of its digits is 489888, while the sum is 47.

The square root of 27439949 is about 5238.3154735086. The cubic root of 27439949 is about 301.6206697401.

The spelling of 27439949 in words is "twenty-seven million, four hundred thirty-nine thousand, nine hundred forty-nine".