2684309 has 4 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 2659116.

The previous prime is 2684299. The next prime is 2684333. The reversal of 2684309 is 9034862.

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: 9034862 = 2 ⋅4517431.

It is a cyclic number.

It is not a de Polignac number, because 2684309 - 2⁴ = 2684293 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 (2684389) 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, 12437 + ... + 12650.

It is an arithmetic number, because the mean of its divisors is an integer number (677376).

2^2684309 is an apocalyptic number.

It is an amenable number.

2684309 is a deficient number, since it is larger than the sum of its proper divisors (25195).

2684309 is a wasteful number, since it uses less digits than its factorization.

2684309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25194.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2684309 is about 1638.3860961324. The cubic root of 2684309 is about 138.9773956997.

The spelling of 2684309 in words is "two million, six hundred eighty-four thousand, three hundred nine".