2779689 has 16 divisors (see below), whose sum is σ = 4080384. Its totient is φ = 1669200.

The previous prime is 2779669. The next prime is 2779703. The reversal of 2779689 is 9869772.

It is not a de Polignac number, because 2779689 - 2⁵ = 2779657 is a prime.

2779689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2779669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4002 + ... + 4644.

It is an arithmetic number, because the mean of its divisors is an integer number (255024).

2^2779689 is an apocalyptic number.

It is an amenable number.

2779689 is a deficient number, since it is larger than the sum of its proper divisors (1300695).

2779689 is a wasteful number, since it uses less digits than its factorization.

2779689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 381024, while the sum is 48.

The square root of 2779689 is about 1667.2399347424. The cubic root of 2779689 is about 140.6043432374.

The spelling of 2779689 in words is "two million, seven hundred seventy-nine thousand, six hundred eighty-nine".