681112147 has 2 divisors, whose sum is σ = 681112148. Its totient is φ = 681112146.

The previous prime is 681112141. The next prime is 681112177. The reversal of 681112147 is 741211186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681112147 - 2³ = 681112139 is a prime.

It is not a weakly prime, because it can be changed into another prime (681112141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340556073 + 340556074.

It is an arithmetic number, because the mean of its divisors is an integer number (340556074).

Almost surely, 2^681112147 is an apocalyptic number.

681112147 is a deficient number, since it is larger than the sum of its proper divisors (1).

681112147 is an equidigital number, since it uses as much as digits as its factorization.

681112147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 31.

The square root of 681112147 is about 26098.1253541322. The cubic root of 681112147 is about 879.8450773248.

The spelling of 681112147 in words is "six hundred eighty-one million, one hundred twelve thousand, one hundred forty-seven".