309116 has 6 divisors (see below), whose sum is σ = 540960. Its totient is φ = 154556.

The previous prime is 309109. The next prime is 309121. The reversal of 309116 is 611903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38636 + ... + 38643.

It is an arithmetic number, because the mean of its divisors is an integer number (90160).

2³⁰⁹¹¹⁶ is an apocalyptic number.

It is an amenable number.

309116 is a deficient number, since it is larger than the sum of its proper divisors (231844).

309116 is a wasteful number, since it uses less digits than its factorization.

309116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77283 (or 77281 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 309116 is about 555.9820140976. The cubic root of 309116 is about 67.6146018432.

Adding to 309116 its sum of digits (20), we get a square (309136 = 556²).

The spelling of 309116 in words is "three hundred nine thousand, one hundred sixteen".