27428543 has 2 divisors, whose sum is σ = 27428544. Its totient is φ = 27428542.

The previous prime is 27428537. The next prime is 27428567. The reversal of 27428543 is 34582472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27428543 - 2¹² = 27424447 is a prime.

It is a super-2 number, since 2×27428543² = 1504649942205698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27428573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13714271 + 13714272.

It is an arithmetic number, because the mean of its divisors is an integer number (13714272).

Almost surely, 2^27428543 is an apocalyptic number.

27428543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27428543 is an equidigital number, since it uses as much as digits as its factorization.

27428543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 27428543 is about 5237.2266515781. The cubic root of 27428543 is about 301.5788722603.

The spelling of 27428543 in words is "twenty-seven million, four hundred twenty-eight thousand, five hundred forty-three".