2720003 has 16 divisors (see below), whose sum is σ = 3338496. Its totient is φ = 2180640.

The previous prime is 2719991. The next prime is 2720009. The reversal of 2720003 is 3000272.

It is not a de Polignac number, because 2720003 - 2⁴ = 2719987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2720003.

It is not an unprimeable number, because it can be changed into a prime (2720009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2876 + ... + 3702.

It is an arithmetic number, because the mean of its divisors is an integer number (208656).

2^2720003 is an apocalyptic number.

2720003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2720003 is a deficient number, since it is larger than the sum of its proper divisors (618493).

2720003 is a wasteful number, since it uses less digits than its factorization.

2720003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 2720003 is about 1649.2431597554. The cubic root of 2720003 is about 139.5906922582.

Adding to 2720003 its reverse (3000272), we get a palindrome (5720275).

The spelling of 2720003 in words is "two million, seven hundred twenty thousand, three".