27239897 has 4 divisors (see below), whose sum is σ = 27260340. Its totient is φ = 27219456.

The previous prime is 27239873. The next prime is 27239921. The reversal of 27239897 is 79893272.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27239873) and next prime (27239921).

It can be written as a sum of positive squares in 2 ways, for example, as 22762441 + 4477456 = 4771^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 27239897 - 2⁶ = 27239833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27239857) 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, 8072 + ... + 10937.

It is an arithmetic number, because the mean of its divisors is an integer number (6815085).

Almost surely, 2^27239897 is an apocalyptic number.

It is an amenable number.

27239897 is a deficient number, since it is larger than the sum of its proper divisors (20443).

27239897 is a wasteful number, since it uses less digits than its factorization.

27239897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20442.

The product of its digits is 381024, while the sum is 47.

The square root of 27239897 is about 5219.1854728492. The cubic root of 27239897 is about 300.8858888357.

The spelling of 27239897 in words is "twenty-seven million, two hundred thirty-nine thousand, eight hundred ninety-seven".