1768989 has 8 divisors (see below), whose sum is σ = 2383360. Its totient is φ = 1166976.

The previous prime is 1768973. The next prime is 1768993. The reversal of 1768989 is 9898671.

It is a happy number.

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

It is not a de Polignac number, because 1768989 - 2⁴ = 1768973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1768589) 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, 2749 + ... + 3330.

It is an arithmetic number, because the mean of its divisors is an integer number (297920).

2^1768989 is an apocalyptic number.

It is an amenable number.

1768989 is a deficient number, since it is larger than the sum of its proper divisors (614371).

1768989 is an equidigital number, since it uses as much as digits as its factorization.

1768989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6179.

The product of its digits is 217728, while the sum is 48.

The square root of 1768989 is about 1330.0334582258. The cubic root of 1768989 is about 120.9414146187.

It can be divided in two parts, 17 and 68989, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 1768989 in words is "one million, seven hundred sixty-eight thousand, nine hundred eighty-nine".