309466 has 4 divisors (see below), whose sum is σ = 464202. Its totient is φ = 154732.

The previous prime is 309461. The next prime is 309469. The reversal of 309466 is 664903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 664903 = 563 ⋅1181.

It can be written as a sum of positive squares in only one way, i.e., 271441 + 38025 = 521^2 + 195^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (309461) by changing a digit.

309466 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77365 + ... + 77368.

2³⁰⁹⁴⁶⁶ is an apocalyptic number.

309466 is a deficient number, since it is larger than the sum of its proper divisors (154736).

309466 is a wasteful number, since it uses less digits than its factorization.

309466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154735.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 309466 is about 556.2966834343. The cubic root of 309466 is about 67.6401113440.

It can be divided in two parts, 3094 and 66, that added together give a triangular number (3160 = T₇₉).

The spelling of 309466 in words is "three hundred nine thousand, four hundred sixty-six".