2664309 has 4 divisors (see below), whose sum is σ = 3552416. Its totient is φ = 1776204.

The previous prime is 2664307. The next prime is 2664329. The reversal of 2664309 is 9034662.

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 not a de Polignac number, because 2664309 - 2¹ = 2664307 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664307) 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, 444049 + ... + 444054.

It is an arithmetic number, because the mean of its divisors is an integer number (888104).

2^2664309 is an apocalyptic number.

It is an amenable number.

2664309 is a deficient number, since it is larger than the sum of its proper divisors (888107).

2664309 is an equidigital number, since it uses as much as digits as its factorization.

2664309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888106.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2664309 is about 1632.2711171861. The cubic root of 2664309 is about 138.6313749510.

The spelling of 2664309 in words is "two million, six hundred sixty-four thousand, three hundred nine".