680181653 has 2 divisors, whose sum is σ = 680181654. Its totient is φ = 680181652.

The previous prime is 680181643. The next prime is 680181673. The reversal of 680181653 is 356181086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678967249 + 1214404 = 26057^2 + 1102^2 .

It is a cyclic number.

It is not a de Polignac number, because 680181653 - 2¹⁰ = 680180629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680181643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340090826 + 340090827.

It is an arithmetic number, because the mean of its divisors is an integer number (340090827).

Almost surely, 2^680181653 is an apocalyptic number.

It is an amenable number.

680181653 is a deficient number, since it is larger than the sum of its proper divisors (1).

680181653 is an equidigital number, since it uses as much as digits as its factorization.

680181653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 680181653 is about 26080.2924255078. The cubic root of 680181653 is about 879.4442311170. Note that the first 3 decimals are identical.

The spelling of 680181653 in words is "six hundred eighty million, one hundred eighty-one thousand, six hundred fifty-three".