681113189 has 4 divisors (see below), whose sum is σ = 689319456. Its totient is φ = 672906924.

The previous prime is 681113171. The next prime is 681113201. The reversal of 681113189 is 981311186.

681113189 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681113189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681113149) 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, 4103009 + ... + 4103174.

It is an arithmetic number, because the mean of its divisors is an integer number (172329864).

Almost surely, 2^681113189 is an apocalyptic number.

It is an amenable number.

681113189 is a deficient number, since it is larger than the sum of its proper divisors (8206267).

681113189 is an equidigital number, since it uses as much as digits as its factorization.

681113189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206266.

The product of its digits is 10368, while the sum is 38.

The square root of 681113189 is about 26098.1453172443. The cubic root of 681113189 is about 879.8455260018.

The spelling of 681113189 in words is "six hundred eighty-one million, one hundred thirteen thousand, one hundred eighty-nine".