27971297 has 8 divisors (see below), whose sum is σ = 28883496. Its totient is φ = 27067392.

The previous prime is 27971291. The next prime is 27971299. The reversal of 27971297 is 79217972.

27971297 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 4 ways, for example, as 10297681 + 17673616 = 3209^2 + 4204^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27971297 - 2¹² = 27967201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27971291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5183 + ... + 9099.

It is an arithmetic number, because the mean of its divisors is an integer number (3610437).

Almost surely, 2^27971297 is an apocalyptic number.

It is an amenable number.

27971297 is a deficient number, since it is larger than the sum of its proper divisors (912199).

27971297 is a wasteful number, since it uses less digits than its factorization.

27971297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147.

The product of its digits is 111132, while the sum is 44.

The square root of 27971297 is about 5288.7897481371. The cubic root of 27971297 is about 303.5551007438. Note that the first 3 decimals are identical.

The spelling of 27971297 in words is "twenty-seven million, nine hundred seventy-one thousand, two hundred ninety-seven".