27972547 has 4 divisors (see below), whose sum is σ = 27984400. Its totient is φ = 27960696.

The previous prime is 27972521. The next prime is 27972563. The reversal of 27972547 is 74527972.

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 is a cyclic number.

It is not a de Polignac number, because 27972547 - 2¹⁹ = 27448259 is a prime.

It is a super-3 number, since 3×27972547³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27972247) 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, 1047 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (6996100).

Almost surely, 2^27972547 is an apocalyptic number.

27972547 is a deficient number, since it is larger than the sum of its proper divisors (11853).

27972547 is an equidigital number, since it uses as much as digits as its factorization.

27972547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11852.

The product of its digits is 246960, while the sum is 43.

The square root of 27972547 is about 5288.9079213010. The cubic root of 27972547 is about 303.5596225008.

The spelling of 27972547 in words is "twenty-seven million, nine hundred seventy-two thousand, five hundred forty-seven".