309463 has 8 divisors (see below), whose sum is σ = 385920. Its totient is φ = 241080.

The previous prime is 309461. The next prime is 309469. The reversal of 309463 is 364903.

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

It is not a de Polignac number, because 309463 - 2¹ = 309461 is a prime.

It is an Ulam number.

It is a Duffinian number.

309463 is a lucky number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1933 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (48240).

2³⁰⁹⁴⁶³ is an apocalyptic number.

309463 is a deficient number, since it is larger than the sum of its proper divisors (76457).

309463 is a wasteful number, since it uses less digits than its factorization.

309463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 309463 is about 556.2939870248. The cubic root of 309463 is about 67.6398927729.

The spelling of 309463 in words is "three hundred nine thousand, four hundred sixty-three".