1916799 has 4 divisors (see below), whose sum is σ = 2555736. Its totient is φ = 1277864.

The previous prime is 1916779. The next prime is 1916809. The reversal of 1916799 is 9976191.

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 1916799 - 2⁸ = 1916543 is a prime.

It is a D-number.

1916799 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1916799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916729) 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, 319464 + ... + 319469.

It is an arithmetic number, because the mean of its divisors is an integer number (638934).

2^1916799 is an apocalyptic number.

1916799 is a deficient number, since it is larger than the sum of its proper divisors (638937).

1916799 is an equidigital number, since it uses as much as digits as its factorization.

1916799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638936.

The product of its digits is 30618, while the sum is 42.

The square root of 1916799 is about 1384.4851028451. The cubic root of 1916799 is about 124.2201906284.

The spelling of 1916799 in words is "one million, nine hundred sixteen thousand, seven hundred ninety-nine".