1868563 has 6 divisors (see below), whose sum is σ = 1907876. Its totient is φ = 1829652.

The previous prime is 1868561. The next prime is 1868567. The reversal of 1868563 is 3658681.

It is not a de Polignac number, because 1868563 - 2¹ = 1868561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11106 + ... + 11272.

2^1868563 is an apocalyptic number.

1868563 is a deficient number, since it is larger than the sum of its proper divisors (39313).

1868563 is an frugal number, since it uses more digits than its factorization.

1868563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 234 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1868563 is about 1366.9539129027. The cubic root of 1868563 is about 123.1693307521.

The spelling of 1868563 in words is "one million, eight hundred sixty-eight thousand, five hundred sixty-three".