1916417 has 4 divisors (see below), whose sum is σ = 1919316. Its totient is φ = 1913520.

The previous prime is 1916413. The next prime is 1916419. The reversal of 1916417 is 7146191.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7146191 = 13 ⋅549707.

It can be written as a sum of positive squares in 2 ways, for example, as 1157776 + 758641 = 1076^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916417 - 2² = 1916413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1916417.

It is not an unprimeable number, because it can be changed into a prime (1916413) 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, 83 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (479829).

2^1916417 is an apocalyptic number.

It is an amenable number.

1916417 is a deficient number, since it is larger than the sum of its proper divisors (2899).

1916417 is a wasteful number, since it uses less digits than its factorization.

1916417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898.

The product of its digits is 1512, while the sum is 29.

The square root of 1916417 is about 1384.3471385458. The cubic root of 1916417 is about 124.2119381086.

The spelling of 1916417 in words is "one million, nine hundred sixteen thousand, four hundred seventeen".