2864309 has 4 divisors (see below), whose sum is σ = 3273504. Its totient is φ = 2455116.

The previous prime is 2864299. The next prime is 2864339. The reversal of 2864309 is 9034682.

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 2864309 - 2⁴ = 2864293 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 (2864339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204587 + ... + 204600.

It is an arithmetic number, because the mean of its divisors is an integer number (818376).

2^2864309 is an apocalyptic number.

It is an amenable number.

2864309 is a deficient number, since it is larger than the sum of its proper divisors (409195).

2864309 is an equidigital number, since it uses as much as digits as its factorization.

2864309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409194.

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

The square root of 2864309 is about 1692.4269555877. The cubic root of 2864309 is about 142.0168762591.

The spelling of 2864309 in words is "two million, eight hundred sixty-four thousand, three hundred nine".