681049 has 2 divisors, whose sum is σ = 681050. Its totient is φ = 681048.

The previous prime is 681047. The next prime is 681061. The reversal of 681049 is 940186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 8649 = 820^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 681049 - 2¹ = 681047 is a prime.

Together with 681047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (681041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340524 + 340525.

It is an arithmetic number, because the mean of its divisors is an integer number (340525).

2⁶⁸¹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

681049 is a deficient number, since it is larger than the sum of its proper divisors (1).

681049 is an equidigital number, since it uses as much as digits as its factorization.

681049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 681049 is about 825.2569296892. The cubic root of 681049 is about 87.9817885868.

It can be divided in two parts, 6810 and 49, that added together give a cube (6859 = 19³).

The spelling of 681049 in words is "six hundred eighty-one thousand, forty-nine".