27405563 has 2 divisors, whose sum is σ = 27405564. Its totient is φ = 27405562.

The previous prime is 27405541. The next prime is 27405569. The reversal of 27405563 is 36550472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27405563 - 2¹⁴ = 27389179 is a prime.

It is not a weakly prime, because it can be changed into another prime (27405569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13702781 + 13702782.

It is an arithmetic number, because the mean of its divisors is an integer number (13702782).

Almost surely, 2^27405563 is an apocalyptic number.

27405563 is a deficient number, since it is larger than the sum of its proper divisors (1).

27405563 is an equidigital number, since it uses as much as digits as its factorization.

27405563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 27405563 is about 5235.0322826130. The cubic root of 27405563 is about 301.4946264582.

The spelling of 27405563 in words is "twenty-seven million, four hundred five thousand, five hundred sixty-three".