678547427 has 2 divisors, whose sum is σ = 678547428. Its totient is φ = 678547426.

The previous prime is 678547409. The next prime is 678547433. The reversal of 678547427 is 724745876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678547427 - 2¹⁰ = 678546403 is a prime.

It is a super-2 number, since 2×678547427² = 920853221376640658, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678547447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339273713 + 339273714.

It is an arithmetic number, because the mean of its divisors is an integer number (339273714).

Almost surely, 2^678547427 is an apocalyptic number.

678547427 is a deficient number, since it is larger than the sum of its proper divisors (1).

678547427 is an equidigital number, since it uses as much as digits as its factorization.

678547427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 50.

The square root of 678547427 is about 26048.9429152125. The cubic root of 678547427 is about 878.7393394213.

The spelling of 678547427 in words is "six hundred seventy-eight million, five hundred forty-seven thousand, four hundred twenty-seven".