1940779 has 2 divisors, whose sum is σ = 1940780. Its totient is φ = 1940778.

The previous prime is 1940777. The next prime is 1940797. The reversal of 1940779 is 9770491.

Together with next prime (1940797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1940779 - 2¹ = 1940777 is a prime.

Together with 1940777, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1940777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970389 + 970390.

It is an arithmetic number, because the mean of its divisors is an integer number (970390).

2^1940779 is an apocalyptic number.

1940779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940779 is an equidigital number, since it uses as much as digits as its factorization.

1940779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 1940779 is about 1393.1184443542. The cubic root of 1940779 is about 124.7360617517.

The spelling of 1940779 in words is "one million, nine hundred forty thousand, seven hundred seventy-nine".