1916923 has 4 divisors (see below), whose sum is σ = 1931688. Its totient is φ = 1902160.

The previous prime is 1916921. The next prime is 1916939. The reversal of 1916923 is 3296191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3296191 = 181 ⋅18211.

It is a cyclic number.

It is not a de Polignac number, because 1916923 - 2¹ = 1916921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1916921) 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, 7186 + ... + 7447.

It is an arithmetic number, because the mean of its divisors is an integer number (482922).

2^1916923 is an apocalyptic number.

1916923 is a deficient number, since it is larger than the sum of its proper divisors (14765).

1916923 is a wasteful number, since it uses less digits than its factorization.

1916923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14764.

The product of its digits is 2916, while the sum is 31.

The square root of 1916923 is about 1384.5298841123. The cubic root of 1916923 is about 124.2228692212. Note that the first 3 decimals are identical.

The spelling of 1916923 in words is "one million, nine hundred sixteen thousand, nine hundred twenty-three".