802309 has 4 divisors (see below), whose sum is σ = 837216. Its totient is φ = 767404.

The previous prime is 802297. The next prime is 802331. The reversal of 802309 is 903208.

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 802309 - 2⁷ = 802181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 802309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802339) 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, 17419 + ... + 17464.

It is an arithmetic number, because the mean of its divisors is an integer number (209304).

2⁸⁰²³⁰⁹ is an apocalyptic number.

It is an amenable number.

802309 is a deficient number, since it is larger than the sum of its proper divisors (34907).

802309 is a wasteful number, since it uses less digits than its factorization.

802309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34906.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 802309 is about 895.7170312102. The cubic root of 802309 is about 92.9210027894.

It can be divided in two parts, 802 and 309, that added together give a palindrome (1111).

The spelling of 802309 in words is "eight hundred two thousand, three hundred nine".