1868689 has 3 divisors (see below), whose sum is σ = 1870057. Its totient is φ = 1867322.

The previous prime is 1868687. The next prime is 1868693. The reversal of 1868689 is 9868681.

The square root of 1868689 is 1367.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9868681 = 211 ⋅46771.

It is not a de Polignac number, because 1868689 - 2¹ = 1868687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 684 + ... + 2050.

2^1868689 is an apocalyptic number.

1868689 is the 1367-th square number.

1868689 is the 684-th centered octagonal number.

It is an amenable number.

1868689 is a deficient number, since it is larger than the sum of its proper divisors (1368).

1868689 is an frugal number, since it uses more digits than its factorization.

1868689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734 (or 1367 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The cubic root of 1868689 is about 123.1720991873.

The spelling of 1868689 in words is "one million, eight hundred sixty-eight thousand, six hundred eighty-nine".