309338 has 4 divisors (see below), whose sum is σ = 464010. Its totient is φ = 154668.

The previous prime is 309317. The next prime is 309359. The reversal of 309338 is 833903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 833903 = 7 ⋅119129.

It is an interprime number because it is at equal distance from previous prime (309317) and next prime (309359).

It can be written as a sum of positive squares in only one way, i.e., 208849 + 100489 = 457^2 + 317^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77333 + ... + 77336.

2³⁰⁹³³⁸ is an apocalyptic number.

309338 is a deficient number, since it is larger than the sum of its proper divisors (154672).

309338 is a wasteful number, since it uses less digits than its factorization.

309338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154671.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 309338 is about 556.1816250111. The cubic root of 309338 is about 67.6307843870.

The spelling of 309338 in words is "three hundred nine thousand, three hundred thirty-eight".