1889661 has 8 divisors (see below), whose sum is σ = 2550240. Its totient is φ = 1244432.

The previous prime is 1889653. The next prime is 1889677. The reversal of 1889661 is 1669881.

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

It is a cyclic number.

It is not a de Polignac number, because 1889661 - 2³ = 1889653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889621) 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, 3546 + ... + 4043.

It is an arithmetic number, because the mean of its divisors is an integer number (318780).

2^1889661 is an apocalyptic number.

It is an amenable number.

1889661 is a deficient number, since it is larger than the sum of its proper divisors (660579).

1889661 is an equidigital number, since it uses as much as digits as its factorization.

1889661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7675.

The product of its digits is 20736, while the sum is 39.

The square root of 1889661 is about 1374.6494098497. The cubic root of 1889661 is about 123.6311664056.

The spelling of 1889661 in words is "one million, eight hundred eighty-nine thousand, six hundred sixty-one".