681197 has 4 divisors (see below), whose sum is σ = 743136. Its totient is φ = 619260.

The previous prime is 681179. The next prime is 681221. The reversal of 681197 is 791186.

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.

It is a cyclic number.

It is not a de Polignac number, because 681197 - 2¹⁶ = 615661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681197.

It is not an unprimeable number, because it can be changed into a prime (681127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30953 + ... + 30974.

It is an arithmetic number, because the mean of its divisors is an integer number (185784).

2⁶⁸¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

681197 is a deficient number, since it is larger than the sum of its proper divisors (61939).

681197 is a wasteful number, since it uses less digits than its factorization.

681197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61938.

The product of its digits is 3024, while the sum is 32.

The square root of 681197 is about 825.3465938622. The cubic root of 681197 is about 87.9881612862.

It can be divided in two parts, 681 and 197, that added together give a palindrome (878).

The spelling of 681197 in words is "six hundred eighty-one thousand, one hundred ninety-seven".