2720917 has 2 divisors, whose sum is σ = 2720918. Its totient is φ = 2720916.

The previous prime is 2720899. The next prime is 2720953. The reversal of 2720917 is 7190272.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 34596 = 1639^2 + 186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720917 - 2⁷ = 2720789 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2720987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360458 + 1360459.

It is an arithmetic number, because the mean of its divisors is an integer number (1360459).

2^2720917 is an apocalyptic number.

It is an amenable number.

2720917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720917 is an equidigital number, since it uses as much as digits as its factorization.

2720917 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 28.

The square root of 2720917 is about 1649.5202332800. The cubic root of 2720917 is about 139.6063260161.

The spelling of 2720917 in words is "two million, seven hundred twenty thousand, nine hundred seventeen".