2642909 has 4 divisors (see below), whose sum is σ = 2704416. Its totient is φ = 2581404.

The previous prime is 2642897. The next prime is 2642929. The reversal of 2642909 is 9092462.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9092462 = 2 ⋅4546231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2642909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642929) 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, 30689 + ... + 30774.

It is an arithmetic number, because the mean of its divisors is an integer number (676104).

2^2642909 is an apocalyptic number.

It is an amenable number.

2642909 is a deficient number, since it is larger than the sum of its proper divisors (61507).

2642909 is an equidigital number, since it uses as much as digits as its factorization.

2642909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61506.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 2642909 is about 1625.7026173320. The cubic root of 2642909 is about 138.2592096561.

The spelling of 2642909 in words is "two million, six hundred forty-two thousand, nine hundred nine".