309080869 has 8 divisors (see below), whose sum is σ = 328381560. Its totient is φ = 290356416.

The previous prime is 309080867. The next prime is 309080887. The reversal of 309080869 is 968080903.

It can be written as a sum of positive squares in 4 ways, for example, as 18378369 + 290702500 = 4287^2 + 17050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 309080869 - 2¹ = 309080867 is a prime.

It is a super-2 number, since 2×309080869² = 191061967163590322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309080867) 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 7 ways as a sum of consecutive naturals, for example, 142954 + ... + 145099.

It is an arithmetic number, because the mean of its divisors is an integer number (41047695).

Almost surely, 2^309080869 is an apocalyptic number.

It is an amenable number.

309080869 is a deficient number, since it is larger than the sum of its proper divisors (19300691).

309080869 is a wasteful number, since it uses less digits than its factorization.

309080869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288119.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 309080869 is about 17580.6959191040. The cubic root of 309080869 is about 676.1204028211.

The spelling of 309080869 in words is "three hundred nine million, eighty thousand, eight hundred sixty-nine".