2709661 has 4 divisors (see below), whose sum is σ = 2715552. Its totient is φ = 2703772.

The previous prime is 2709659. The next prime is 2709667. The reversal of 2709661 is 1669072.

2709661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2709661 - 2¹ = 2709659 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2709667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2191 + ... + 3196.

It is an arithmetic number, because the mean of its divisors is an integer number (678888).

2^2709661 is an apocalyptic number.

It is an amenable number.

2709661 is a deficient number, since it is larger than the sum of its proper divisors (5891).

2709661 is an equidigital number, since it uses as much as digits as its factorization.

2709661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2709661 is about 1646.1047961779. The cubic root of 2709661 is about 139.4135502363.

The spelling of 2709661 in words is "two million, seven hundred nine thousand, six hundred sixty-one".