1683989 has 8 divisors (see below), whose sum is σ = 1784640. Its totient is φ = 1584576.

The previous prime is 1683977. The next prime is 1684019. The reversal of 1683989 is 9893861.

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 1683989 - 2⁸ = 1683733 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 (1683949) 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, 4829 + ... + 5165.

It is an arithmetic number, because the mean of its divisors is an integer number (223080).

2^1683989 is an apocalyptic number.

1683989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1683989 is a deficient number, since it is larger than the sum of its proper divisors (100651).

1683989 is a wasteful number, since it uses less digits than its factorization.

1683989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 93312, while the sum is 44.

The square root of 1683989 is about 1297.6860174942. The cubic root of 1683989 is about 118.9724531959.

The spelling of 1683989 in words is "one million, six hundred eighty-three thousand, nine hundred eighty-nine".