1916863 has 4 divisors (see below), whose sum is σ = 2064328. Its totient is φ = 1769400.

The previous prime is 1916857. The next prime is 1916867. The reversal of 1916863 is 3686191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3686191 = 167 ⋅22073.

It is a cyclic number.

It is not a de Polignac number, because 1916863 - 2⁹ = 1916351 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 (1916867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73713 + ... + 73738.

It is an arithmetic number, because the mean of its divisors is an integer number (516082).

2^1916863 is an apocalyptic number.

1916863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1916863 is a deficient number, since it is larger than the sum of its proper divisors (147465).

1916863 is a wasteful number, since it uses less digits than its factorization.

1916863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147464.

The product of its digits is 7776, while the sum is 34.

The square root of 1916863 is about 1384.5082159381. The cubic root of 1916863 is about 124.2215731423.

The spelling of 1916863 in words is "one million, nine hundred sixteen thousand, eight hundred sixty-three".