2720659 has 4 divisors (see below), whose sum is σ = 2724904. Its totient is φ = 2716416.

The previous prime is 2720623. The next prime is 2720671. The reversal of 2720659 is 9560272.

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 2720659 - 2⁹ = 2720147 is a prime.

It is a Duffinian number.

2720659 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720659.

It is not an unprimeable number, because it can be changed into a prime (2720609) 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, 942 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (681226).

2^2720659 is an apocalyptic number.

2720659 is a deficient number, since it is larger than the sum of its proper divisors (4245).

2720659 is an equidigital number, since it uses as much as digits as its factorization.

2720659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 2720659 is about 1649.4420268685. The cubic root of 2720659 is about 139.6019133407.

The spelling of 2720659 in words is "two million, seven hundred twenty thousand, six hundred fifty-nine".