681214559 has 2 divisors, whose sum is σ = 681214560. Its totient is φ = 681214558.

The previous prime is 681214507. The next prime is 681214561. The reversal of 681214559 is 955412186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681214559 - 2¹⁶ = 681149023 is a prime.

Together with 681214561, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_35329694 and since 681214559 and 35329694 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681234559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340607279 + 340607280.

It is an arithmetic number, because the mean of its divisors is an integer number (340607280).

Almost surely, 2^681214559 is an apocalyptic number.

681214559 is a deficient number, since it is larger than the sum of its proper divisors (1).

681214559 is an equidigital number, since it uses as much as digits as its factorization.

681214559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 681214559 is about 26100.0873370186. The cubic root of 681214559 is about 879.8891729404.

The spelling of 681214559 in words is "six hundred eighty-one million, two hundred fourteen thousand, five hundred fifty-nine".