2720947 has 4 divisors (see below), whose sum is σ = 2749096. Its totient is φ = 2692800.

The previous prime is 2720917. The next prime is 2720953. The reversal of 2720947 is 7490272.

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 2720947 - 2¹⁹ = 2196659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720917) 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, 13929 + ... + 14122.

It is an arithmetic number, because the mean of its divisors is an integer number (687274).

2^2720947 is an apocalyptic number.

2720947 is a deficient number, since it is larger than the sum of its proper divisors (28149).

2720947 is an equidigital number, since it uses as much as digits as its factorization.

2720947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28148.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 2720947 is about 1649.5293268081. The cubic root of 2720947 is about 139.6068390998.

The spelling of 2720947 in words is "two million, seven hundred twenty thousand, nine hundred forty-seven".