189000681 has 4 divisors (see below), whose sum is σ = 252000912. Its totient is φ = 126000452.

The previous prime is 189000653. The next prime is 189000697. The reversal of 189000681 is 186000981.

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 189000681 - 2⁵ = 189000649 is a prime.

It is a super-2 number, since 2×189000681² = 71442514836927522, which contains 22 as substring.

189000681 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189000281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31500111 + ... + 31500116.

It is an arithmetic number, because the mean of its divisors is an integer number (63000228).

Almost surely, 2^189000681 is an apocalyptic number.

It is an amenable number.

189000681 is a deficient number, since it is larger than the sum of its proper divisors (63000231).

189000681 is an equidigital number, since it uses as much as digits as its factorization.

189000681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63000230.

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

The square root of 189000681 is about 13747.7518525758. The cubic root of 189000681 is about 573.8800440934.

The spelling of 189000681 in words is "one hundred eighty-nine million, six hundred eighty-one", and thus it is an aban number.