2721913 has 2 divisors, whose sum is σ = 2721914. Its totient is φ = 2721912.

The previous prime is 2721899. The next prime is 2721947. The reversal of 2721913 is 3191272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2036329 + 685584 = 1427^2 + 828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721913 - 2⁹ = 2721401 is a prime.

It is not a weakly prime, because it can be changed into another prime (2721013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360956 + 1360957.

It is an arithmetic number, because the mean of its divisors is an integer number (1360957).

2^2721913 is an apocalyptic number.

It is an amenable number.

2721913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721913 is an equidigital number, since it uses as much as digits as its factorization.

2721913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 2721913 is about 1649.8221116229. The cubic root of 2721913 is about 139.6233583790.

The spelling of 2721913 in words is "two million, seven hundred twenty-one thousand, nine hundred thirteen".