2720513 has 2 divisors, whose sum is σ = 2720514. Its totient is φ = 2720512.

The previous prime is 2720503. The next prime is 2720551. The reversal of 2720513 is 3150272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2666689 + 53824 = 1633^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720513 - 2¹⁴ = 2704129 is a prime.

It is not a weakly prime, because it can be changed into another prime (2720503) 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 as a sum of consecutive naturals, namely, 1360256 + 1360257.

It is an arithmetic number, because the mean of its divisors is an integer number (1360257).

2^2720513 is an apocalyptic number.

It is an amenable number.

2720513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720513 is an equidigital number, since it uses as much as digits as its factorization.

2720513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2720513 is about 1649.3977688841. The cubic root of 2720513 is about 139.5994161217.

Adding to 2720513 its reverse (3150272), we get a palindrome (5870785).

The spelling of 2720513 in words is "two million, seven hundred twenty thousand, five hundred thirteen".