2779259 has 4 divisors (see below), whose sum is σ = 3176304. Its totient is φ = 2382216.

The previous prime is 2779253. The next prime is 2779261. The reversal of 2779259 is 9529772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2779259 - 2¹² = 2775163 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 (2779253) 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, 198512 + ... + 198525.

It is an arithmetic number, because the mean of its divisors is an integer number (794076).

2^2779259 is an apocalyptic number.

2779259 is a deficient number, since it is larger than the sum of its proper divisors (397045).

2779259 is an equidigital number, since it uses as much as digits as its factorization.

2779259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397044.

The product of its digits is 79380, while the sum is 41.

The square root of 2779259 is about 1667.1109741106. The cubic root of 2779259 is about 140.5970926679.

The spelling of 2779259 in words is "two million, seven hundred seventy-nine thousand, two hundred fifty-nine".