681193 has 4 divisors (see below), whose sum is σ = 685440. Its totient is φ = 676948.

The previous prime is 681179. The next prime is 681221. The reversal of 681193 is 391186.

It is a happy number.

681193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 391186 = 2 ⋅195593.

It is a cyclic number.

It is not a de Polignac number, because 681193 - 2⁹ = 680681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1873 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (171360).

2⁶⁸¹¹⁹³ is an apocalyptic number.

It is an amenable number.

681193 is a deficient number, since it is larger than the sum of its proper divisors (4247).

681193 is a wasteful number, since it uses less digits than its factorization.

681193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246.

The product of its digits is 1296, while the sum is 28.

The square root of 681193 is about 825.3441706343. The cubic root of 681193 is about 87.9879890632.

The spelling of 681193 in words is "six hundred eighty-one thousand, one hundred ninety-three".