2720489 has 4 divisors (see below), whose sum is σ = 2729040. Its totient is φ = 2711940.

The previous prime is 2720447. The next prime is 2720503. The reversal of 2720489 is 9840272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2720489 - 2¹² = 2716393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720089) 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, 3779 + ... + 4440.

It is an arithmetic number, because the mean of its divisors is an integer number (682260).

2^2720489 is an apocalyptic number.

It is an amenable number.

2720489 is a deficient number, since it is larger than the sum of its proper divisors (8551).

2720489 is an equidigital number, since it uses as much as digits as its factorization.

2720489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2720489 is about 1649.3904934854. The cubic root of 2720489 is about 139.5990056114.

The spelling of 2720489 in words is "two million, seven hundred twenty thousand, four hundred eighty-nine".