27561047 has 2 divisors, whose sum is σ = 27561048. Its totient is φ = 27561046.

The previous prime is 27561019. The next prime is 27561073. The reversal of 27561047 is 74016572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27561047 - 2⁶ = 27560983 is a prime.

It is a super-2 number, since 2×27561047² = 1519222623472418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27560047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780523 + 13780524.

It is an arithmetic number, because the mean of its divisors is an integer number (13780524).

Almost surely, 2^27561047 is an apocalyptic number.

27561047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27561047 is an equidigital number, since it uses as much as digits as its factorization.

27561047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 27561047 is about 5249.8616172238. The cubic root of 27561047 is about 302.0637227930.

The spelling of 27561047 in words is "twenty-seven million, five hundred sixty-one thousand, forty-seven".