1799863 has 4 divisors (see below), whose sum is σ = 1938328. Its totient is φ = 1661400.

The previous prime is 1799849. The next prime is 1799867. The reversal of 1799863 is 3689971.

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

It is not a de Polignac number, because 1799863 - 2¹⁷ = 1668791 is a prime.

It is an Ulam number.

It is a Duffinian number.

1799863 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799867) 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, 69213 + ... + 69238.

It is an arithmetic number, because the mean of its divisors is an integer number (484582).

2^1799863 is an apocalyptic number.

1799863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1799863 is a deficient number, since it is larger than the sum of its proper divisors (138465).

1799863 is a wasteful number, since it uses less digits than its factorization.

1799863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138464.

The product of its digits is 81648, while the sum is 43.

The square root of 1799863 is about 1341.5897286429. The cubic root of 1799863 is about 121.6409536788.

It can be divided in two parts, 1799 and 863, that added together give a palindrome (2662).

The spelling of 1799863 in words is "one million, seven hundred ninety-nine thousand, eight hundred sixty-three".