2720847 has 4 divisors (see below), whose sum is σ = 3627800. Its totient is φ = 1813896.

The previous prime is 2720843. The next prime is 2720849. The reversal of 2720847 is 7480272.

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

It is not a de Polignac number, because 2720847 - 2² = 2720843 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720843) 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, 453472 + ... + 453477.

It is an arithmetic number, because the mean of its divisors is an integer number (906950).

2^2720847 is an apocalyptic number.

2720847 is a deficient number, since it is larger than the sum of its proper divisors (906953).

2720847 is an equidigital number, since it uses as much as digits as its factorization.

2720847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906952.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 2720847 is about 1649.4990148527. The cubic root of 2720847 is about 139.6051288061.

The spelling of 2720847 in words is "two million, seven hundred twenty thousand, eight hundred forty-seven".