681486853 has 2 divisors, whose sum is σ = 681486854. Its totient is φ = 681486852.

The previous prime is 681486823. The next prime is 681486881. The reversal of 681486853 is 358684186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679227844 + 2259009 = 26062^2 + 1503^2 .

It is a cyclic number.

It is not a de Polignac number, because 681486853 - 2²¹ = 679389701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681486797 and 681486806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681486823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340743426 + 340743427.

It is an arithmetic number, because the mean of its divisors is an integer number (340743427).

Almost surely, 2^681486853 is an apocalyptic number.

It is an amenable number.

681486853 is a deficient number, since it is larger than the sum of its proper divisors (1).

681486853 is an equidigital number, since it uses as much as digits as its factorization.

681486853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 49.

The square root of 681486853 is about 26105.3031585538. The cubic root of 681486853 is about 880.0063932903.

The spelling of 681486853 in words is "six hundred eighty-one million, four hundred eighty-six thousand, eight hundred fifty-three".