1916769 has 4 divisors (see below), whose sum is σ = 2555696. Its totient is φ = 1277844.

The previous prime is 1916753. The next prime is 1916773. The reversal of 1916769 is 9676191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1916769 - 2⁴ = 1916753 is a prime.

It is a super-2 number, since 2×1916769² = 7348006798722, which contains 22 as substring.

It is a D-number.

It is a Duffinian 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319459 + ... + 319464.

It is an arithmetic number, because the mean of its divisors is an integer number (638924).

2^1916769 is an apocalyptic number.

It is an amenable number.

1916769 is a deficient number, since it is larger than the sum of its proper divisors (638927).

1916769 is an equidigital number, since it uses as much as digits as its factorization.

1916769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638926.

The product of its digits is 20412, while the sum is 39.

The square root of 1916769 is about 1384.4742684499. The cubic root of 1916769 is about 124.2195425645.

The spelling of 1916769 in words is "one million, nine hundred sixteen thousand, seven hundred sixty-nine".