1683988 has 6 divisors (see below), whose sum is σ = 2946986. Its totient is φ = 841992.

The previous prime is 1683977. The next prime is 1684019. The reversal of 1683988 is 8893861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1258884 + 425104 = 1122^2 + 652^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210495 + ... + 210502.

2^1683988 is an apocalyptic number.

It is an amenable number.

1683988 is a deficient number, since it is larger than the sum of its proper divisors (1262998).

1683988 is a wasteful number, since it uses less digits than its factorization.

1683988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421001 (or 420999 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 1683988 is about 1297.6856321929. The cubic root of 1683988 is about 118.9724296461.

The spelling of 1683988 in words is "one million, six hundred eighty-three thousand, nine hundred eighty-eight".