681000189 has 8 divisors (see below), whose sum is σ = 908319552. Its totient is φ = 453840480.

The previous prime is 681000167. The next prime is 681000191. The reversal of 681000189 is 981000186.

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

It is not a de Polignac number, because 681000189 - 2⁸ = 680999933 is a prime.

It is a super-2 number, since 2×681000189² = 927522514836071442, which contains 22 as substring.

681000189 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681000139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29577 + ... + 47294.

It is an arithmetic number, because the mean of its divisors is an integer number (113539944).

Almost surely, 2^681000189 is an apocalyptic number.

It is an amenable number.

681000189 is a deficient number, since it is larger than the sum of its proper divisors (227319363).

681000189 is a wasteful number, since it uses less digits than its factorization.

681000189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79827.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 681000189 is about 26095.9803226474. The cubic root of 681000189 is about 879.7968664228.

The spelling of 681000189 in words is "six hundred eighty-one million, one hundred eighty-nine", and thus it is an aban number.