1940791 has 4 divisors (see below), whose sum is σ = 1944000. Its totient is φ = 1937584.

The previous prime is 1940779. The next prime is 1940797. The reversal of 1940791 is 1970491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1940791 - 2⁵ = 1940759 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940797) 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, 391 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

2^1940791 is an apocalyptic number.

1940791 is a deficient number, since it is larger than the sum of its proper divisors (3209).

1940791 is an equidigital number, since it uses as much as digits as its factorization.

1940791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1940791 is about 1393.1227512319. The cubic root of 1940791 is about 124.7363188357.

The spelling of 1940791 in words is "one million, nine hundred forty thousand, seven hundred ninety-one".