2279999 has 4 divisors (see below), whose sum is σ = 2286336. Its totient is φ = 2273664.

The previous prime is 2279993. The next prime is 2280011. The reversal of 2279999 is 9999722.

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 2279999 - 2⁸ = 2279743 is a prime.

It is a Duffinian number.

2279999 is a modest number, since divided by 9999 gives 227 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2279993) 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, 2594 + ... + 3359.

It is an arithmetic number, because the mean of its divisors is an integer number (571584).

2^2279999 is an apocalyptic number.

2279999 is a deficient number, since it is larger than the sum of its proper divisors (6337).

2279999 is an equidigital number, since it uses as much as digits as its factorization.

2279999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336.

The product of its digits is 183708, while the sum is 47.

The square root of 2279999 is about 1509.9665559210. The cubic root of 2279999 is about 131.6168680626.

The spelling of 2279999 in words is "two million, two hundred seventy-nine thousand, nine hundred ninety-nine".