2718609 has 4 divisors (see below), whose sum is σ = 3624816. Its totient is φ = 1812404.

The previous prime is 2718601. The next prime is 2718613. The reversal of 2718609 is 9068172.

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 2718609 - 2³ = 2718601 is a prime.

It is a D-number.

2718609 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2718609.

It is not an unprimeable number, because it can be changed into a prime (2718601) 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, 453099 + ... + 453104.

It is an arithmetic number, because the mean of its divisors is an integer number (906204).

2^2718609 is an apocalyptic number.

It is an amenable number.

2718609 is a deficient number, since it is larger than the sum of its proper divisors (906207).

2718609 is an equidigital number, since it uses as much as digits as its factorization.

2718609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906206.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2718609 is about 1648.8204875001. The cubic root of 2718609 is about 139.5668414663.

The spelling of 2718609 in words is "two million, seven hundred eighteen thousand, six hundred nine".