1866463 has 4 divisors (see below), whose sum is σ = 1884688. Its totient is φ = 1848240.

The previous prime is 1866461. The next prime is 1866467. The reversal of 1866463 is 3646681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1866463 - 2¹ = 1866461 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 (1866461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8958 + ... + 9163.

It is an arithmetic number, because the mean of its divisors is an integer number (471172).

2^1866463 is an apocalyptic number.

1866463 is a deficient number, since it is larger than the sum of its proper divisors (18225).

1866463 is a wasteful number, since it uses less digits than its factorization.

1866463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18224.

The product of its digits is 20736, while the sum is 34.

The square root of 1866463 is about 1366.1855657267. The cubic root of 1866463 is about 123.1231718316.

The spelling of 1866463 in words is "one million, eight hundred sixty-six thousand, four hundred sixty-three".