678213527 has 2 divisors, whose sum is σ = 678213528. Its totient is φ = 678213526.

The previous prime is 678213509. The next prime is 678213533. The reversal of 678213527 is 725312876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678213527 - 2¹² = 678209431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678213127) 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, 339106763 + 339106764.

It is an arithmetic number, because the mean of its divisors is an integer number (339106764).

Almost surely, 2^678213527 is an apocalyptic number.

678213527 is a deficient number, since it is larger than the sum of its proper divisors (1).

678213527 is an equidigital number, since it uses as much as digits as its factorization.

678213527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 678213527 is about 26042.5330373218. The cubic root of 678213527 is about 878.5951789229.

The spelling of 678213527 in words is "six hundred seventy-eight million, two hundred thirteen thousand, five hundred twenty-seven".