2057789 has 4 divisors (see below), whose sum is σ = 2069340. Its totient is φ = 2046240.

The previous prime is 2057779. The next prime is 2057791. The reversal of 2057789 is 9877502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 444889 + 1612900 = 667^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2057789 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 (2057729) 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, 5504 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (517335).

2^2057789 is an apocalyptic number.

It is an amenable number.

2057789 is a deficient number, since it is larger than the sum of its proper divisors (11551).

2057789 is a wasteful number, since it uses less digits than its factorization.

2057789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11550.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 2057789 is about 1434.4995643081. The cubic root of 2057789 is about 127.1940942698.

The spelling of 2057789 in words is "two million, fifty-seven thousand, seven hundred eighty-nine".