2279279 has 4 divisors (see below), whose sum is σ = 2310576. Its totient is φ = 2247984.

The previous prime is 2279261. The next prime is 2279281. The reversal of 2279279 is 9729722.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2279279 is a prime.

It is a super-3 number, since 3×2279279³ = 35523334248412903917, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2279239) 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 3 ways as a sum of consecutive naturals, for example, 15539 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (577644).

2^2279279 is an apocalyptic number.

2279279 is a deficient number, since it is larger than the sum of its proper divisors (31297).

2279279 is an equidigital number, since it uses as much as digits as its factorization.

2279279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31296.

The product of its digits is 31752, while the sum is 38.

The square root of 2279279 is about 1509.7281212192. The cubic root of 2279279 is about 131.6030121907.

The spelling of 2279279 in words is "two million, two hundred seventy-nine thousand, two hundred seventy-nine".