2720791 has 4 divisors (see below), whose sum is σ = 2759184. Its totient is φ = 2682400.

The previous prime is 2720789. The next prime is 2720797. The reversal of 2720791 is 1970272.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2720791 - 2¹ = 2720789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19090 + ... + 19231.

It is an arithmetic number, because the mean of its divisors is an integer number (689796).

2^2720791 is an apocalyptic number.

2720791 is a deficient number, since it is larger than the sum of its proper divisors (38393).

2720791 is an equidigital number, since it uses as much as digits as its factorization.

2720791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38392.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2720791 is about 1649.4820399143. The cubic root of 2720791 is about 139.6041710234.

The spelling of 2720791 in words is "two million, seven hundred twenty thousand, seven hundred ninety-one".