2789657 has 4 divisors (see below), whose sum is σ = 3004260. Its totient is φ = 2575056.

The previous prime is 2789629. The next prime is 2789669. The reversal of 2789657 is 7569872.

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 491401 + 2298256 = 701^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2789657 - 2⁶ = 2789593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2789617) 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, 107282 + ... + 107307.

It is an arithmetic number, because the mean of its divisors is an integer number (751065).

2^2789657 is an apocalyptic number.

It is an amenable number.

2789657 is a deficient number, since it is larger than the sum of its proper divisors (214603).

2789657 is a wasteful number, since it uses less digits than its factorization.

2789657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214602.

The product of its digits is 211680, while the sum is 44.

The square root of 2789657 is about 1670.2266313288. The cubic root of 2789657 is about 140.7722123893.

The spelling of 2789657 in words is "two million, seven hundred eighty-nine thousand, six hundred fifty-seven".