1942789 has 4 divisors (see below), whose sum is σ = 1974700. Its totient is φ = 1910880.

The previous prime is 1942771. The next prime is 1942793. The reversal of 1942789 is 9872491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9872491 = 47 ⋅210053.

It can be written as a sum of positive squares in 2 ways, for example, as 422500 + 1520289 = 650^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1942789 - 2⁵ = 1942757 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 (1942729) 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, 15864 + ... + 15985.

It is an arithmetic number, because the mean of its divisors is an integer number (493675).

2^1942789 is an apocalyptic number.

It is an amenable number.

1942789 is a deficient number, since it is larger than the sum of its proper divisors (31911).

1942789 is an equidigital number, since it uses as much as digits as its factorization.

1942789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31910.

The product of its digits is 36288, while the sum is 40.

The square root of 1942789 is about 1393.8396607932. The cubic root of 1942789 is about 124.7791085523.

The spelling of 1942789 in words is "one million, nine hundred forty-two thousand, seven hundred eighty-nine".