2730721003 has 2 divisors, whose sum is σ = 2730721004. Its totient is φ = 2730721002.

The previous prime is 2730720973. The next prime is 2730721043. The reversal of 2730721003 is 3001270372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2730721003 - 2⁹ = 2730720491 is a prime.

It is not a weakly prime, because it can be changed into another prime (2730721043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365360501 + 1365360502.

It is an arithmetic number, because the mean of its divisors is an integer number (1365360502).

Almost surely, 2^2730721003 is an apocalyptic number.

2730721003 is a deficient number, since it is larger than the sum of its proper divisors (1).

2730721003 is an equidigital number, since it uses as much as digits as its factorization.

2730721003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 2730721003 is about 52256.3010841755. The cubic root of 2730721003 is about 1397.7380144461.

Adding to 2730721003 its reverse (3001270372), we get a palindrome (5731991375).

The spelling of 2730721003 in words is "two billion, seven hundred thirty million, seven hundred twenty-one thousand, three".