1916887 has 8 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 1635000.

The previous prime is 1916881. The next prime is 1916909. The reversal of 1916887 is 7886191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1916887 - 2¹⁵ = 1884119 is a prime.

It is an Ulam number.

1916887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212 + ... + 2302.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

2^1916887 is an apocalyptic number.

1916887 is a deficient number, since it is larger than the sum of its proper divisors (284585).

1916887 is a wasteful number, since it uses less digits than its factorization.

1916887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its digits is 24192, while the sum is 40.

The square root of 1916887 is about 1384.5168832484. The cubic root of 1916887 is about 124.2220915771. Note that the first 3 decimals are identical.

The spelling of 1916887 in words is "one million, nine hundred sixteen thousand, eight hundred eighty-seven".