189000661 has 4 divisors (see below), whose sum is σ = 189037612. Its totient is φ = 188963712.

The previous prime is 189000653. The next prime is 189000697. The reversal of 189000661 is 166000981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96648561 + 92352100 = 9831^2 + 9610^2 .

It is a cyclic number.

It is not a de Polignac number, because 189000661 - 2³ = 189000653 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 (189000061) 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, 9276 + ... + 21541.

It is an arithmetic number, because the mean of its divisors is an integer number (47259403).

Almost surely, 2^189000661 is an apocalyptic number.

It is an amenable number.

189000661 is a deficient number, since it is larger than the sum of its proper divisors (36951).

189000661 is an equidigital number, since it uses as much as digits as its factorization.

189000661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36950.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 189000661 is about 13747.7511251841. The cubic root of 189000661 is about 573.8800238508.

The spelling of 189000661 in words is "one hundred eighty-nine million, six hundred sixty-one", and thus it is an aban number.