2663309 has 4 divisors (see below), whose sum is σ = 2905440. Its totient is φ = 2421180.

The previous prime is 2663299. The next prime is 2663347. The reversal of 2663309 is 9033662.

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 2663309 - 2⁴ = 2663293 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 (2663359) 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, 121049 + ... + 121070.

It is an arithmetic number, because the mean of its divisors is an integer number (726360).

2^2663309 is an apocalyptic number.

It is an amenable number.

2663309 is a deficient number, since it is larger than the sum of its proper divisors (242131).

2663309 is a wasteful number, since it uses less digits than its factorization.

2663309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242130.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 2663309 is about 1631.9647667765. The cubic root of 2663309 is about 138.6140285242.

The spelling of 2663309 in words is "two million, six hundred sixty-three thousand, three hundred nine".