1854989 has 8 divisors (see below), whose sum is σ = 2067840. Its totient is φ = 1653696.

The previous prime is 1854971. The next prime is 1854991. The reversal of 1854989 is 9894581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1854989 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1854089) 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, 2549 + ... + 3194.

It is an arithmetic number, because the mean of its divisors is an integer number (258480).

2^1854989 is an apocalyptic number.

1854989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1854989 is a deficient number, since it is larger than the sum of its proper divisors (212851).

1854989 is a wasteful number, since it uses less digits than its factorization.

1854989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779.

The product of its digits is 103680, while the sum is 44.

The square root of 1854989 is about 1361.9798089546. The cubic root of 1854989 is about 122.8703549494.

The spelling of 1854989 in words is "one million, eight hundred fifty-four thousand, nine hundred eighty-nine".