27128473 has 2 divisors, whose sum is σ = 27128474. Its totient is φ = 27128472.

The previous prime is 27128443. The next prime is 27128531. The reversal of 27128473 is 37482172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26183689 + 944784 = 5117^2 + 972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27128473 is a prime.

It is the 5209-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (27128443) by changing a digit.

It is a nontrivial repunit in base 5208.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564236 + 13564237.

It is an arithmetic number, because the mean of its divisors is an integer number (13564237).

Almost surely, 2^27128473 is an apocalyptic number.

It is an amenable number.

27128473 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128473 is an equidigital number, since it uses as much as digits as its factorization.

27128473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 27128473 is about 5208.5000719977. The cubic root of 27128473 is about 300.4750732136.

The spelling of 27128473 in words is "twenty-seven million, one hundred twenty-eight thousand, four hundred seventy-three".