681342213 has 8 divisors (see below), whose sum is σ = 909087328. Its totient is φ = 453912624.

The previous prime is 681342169. The next prime is 681342217. The reversal of 681342213 is 312243186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681342213 - 2⁹ = 681341701 is a prime.

It is a super-2 number, since 2×681342213² = 928454422431474738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681342217) 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 in 7 ways as a sum of consecutive naturals, for example, 73795 + ... + 82512.

It is an arithmetic number, because the mean of its divisors is an integer number (113635916).

Almost surely, 2^681342213 is an apocalyptic number.

It is an amenable number.

681342213 is a deficient number, since it is larger than the sum of its proper divisors (227745115).

681342213 is a wasteful number, since it uses less digits than its factorization.

681342213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157763.

The product of its digits is 6912, while the sum is 30.

The square root of 681342213 is about 26102.5326932081. The cubic root of 681342213 is about 879.9441308367.

Adding to 681342213 its reverse (312243186), we get a palindrome (993585399).

The spelling of 681342213 in words is "six hundred eighty-one million, three hundred forty-two thousand, two hundred thirteen".