681293 has 2 divisors, whose sum is σ = 681294. Its totient is φ = 681292.

The previous prime is 681271. The next prime is 681311. The reversal of 681293 is 392186.

681293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 243049 = 662^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 681293 - 2⁶ = 681229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340646 + 340647.

It is an arithmetic number, because the mean of its divisors is an integer number (340647).

2⁶⁸¹²⁹³ is an apocalyptic number.

It is an amenable number.

681293 is a deficient number, since it is larger than the sum of its proper divisors (1).

681293 is an equidigital number, since it uses as much as digits as its factorization.

681293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 681293 is about 825.4047491988. The cubic root of 681293 is about 87.9922944355.

The spelling of 681293 in words is "six hundred eighty-one thousand, two hundred ninety-three".