1689956 has 12 divisors (see below), whose sum is σ = 2970240. Its totient is φ = 841320.

The previous prime is 1689931. The next prime is 1689967. The reversal of 1689956 is 6599861.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (247520).

2^1689956 is an apocalyptic number.

It is an amenable number.

1689956 is a deficient number, since it is larger than the sum of its proper divisors (1280284).

1689956 is a wasteful number, since it uses less digits than its factorization.

1689956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1832 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 1689956 is about 1299.9830768129. The cubic root of 1689956 is about 119.1128087811.

Adding to 1689956 its sum of digits (44), we get a square (1690000 = 1300²).

The spelling of 1689956 in words is "one million, six hundred eighty-nine thousand, nine hundred fifty-six".