309673 has 16 divisors (see below), whose sum is σ = 395136. Its totient is φ = 236160.

The previous prime is 309671. The next prime is 309677. The reversal of 309673 is 376903.

It is not a de Polignac number, because 309673 - 2¹ = 309671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (309671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3690 + ... + 3772.

It is an arithmetic number, because the mean of its divisors is an integer number (24696).

2³⁰⁹⁶⁷³ is an apocalyptic number.

It is an amenable number.

309673 is a deficient number, since it is larger than the sum of its proper divisors (85463).

309673 is a wasteful number, since it uses less digits than its factorization.

309673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 309673 is about 556.4827041337. The cubic root of 309673 is about 67.6551893411.

The spelling of 309673 in words is "three hundred nine thousand, six hundred seventy-three".