1916791 has 4 divisors (see below), whose sum is σ = 1963584. Its totient is φ = 1870000.

The previous prime is 1916779. The next prime is 1916809. The reversal of 1916791 is 1976191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1976191 = 7 ⋅282313.

It is a cyclic number.

It is not a de Polignac number, because 1916791 - 2⁹ = 1916279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916731) 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, 23335 + ... + 23416.

It is an arithmetic number, because the mean of its divisors is an integer number (490896).

2^1916791 is an apocalyptic number.

1916791 is a deficient number, since it is larger than the sum of its proper divisors (46793).

1916791 is an equidigital number, since it uses as much as digits as its factorization.

1916791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46792.

The product of its digits is 3402, while the sum is 34.

The square root of 1916791 is about 1384.4822136813. The cubic root of 1916791 is about 124.2200178120.

The spelling of 1916791 in words is "one million, nine hundred sixteen thousand, seven hundred ninety-one".