27472997 has 4 divisors (see below), whose sum is σ = 27923436. Its totient is φ = 27022560.

The previous prime is 27472987. The next prime is 27473009. The reversal of 27472997 is 79927472.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11464996 + 16008001 = 3386^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 27472997 - 2¹⁴ = 27456613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27472987) 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, 225128 + ... + 225249.

It is an arithmetic number, because the mean of its divisors is an integer number (6980859).

Almost surely, 2^27472997 is an apocalyptic number.

It is an amenable number.

27472997 is a deficient number, since it is larger than the sum of its proper divisors (450439).

27472997 is an equidigital number, since it uses as much as digits as its factorization.

27472997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450438.

The product of its digits is 444528, while the sum is 47.

The square root of 27472997 is about 5241.4689734844. The cubic root of 27472997 is about 301.7417093340.

The spelling of 27472997 in words is "twenty-seven million, four hundred seventy-two thousand, nine hundred ninety-seven".