2051779 has 8 divisors (see below), whose sum is σ = 2142000. Its totient is φ = 1962912.

The previous prime is 2051773. The next prime is 2051801. The reversal of 2051779 is 9771502.

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 2051779 - 2⁹ = 2051267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051773) 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 in 7 ways as a sum of consecutive naturals, for example, 3777 + ... + 4285.

It is an arithmetic number, because the mean of its divisors is an integer number (267750).

2^2051779 is an apocalyptic number.

2051779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2051779 is a deficient number, since it is larger than the sum of its proper divisors (90221).

2051779 is a wasteful number, since it uses less digits than its factorization.

2051779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 2051779 is about 1432.4032253524. The cubic root of 2051779 is about 127.0701453901.

The spelling of 2051779 in words is "two million, fifty-one thousand, seven hundred seventy-nine".