309994 has 12 divisors (see below), whose sum is σ = 487746. Its totient is φ = 147752.

The previous prime is 309989. The next prime is 310019. The reversal of 309994 is 499903.

309994 = 30² + 31² + ... + 98².

It can be written as a sum of positive squares in only one way, i.e., 190969 + 119025 = 437^2 + 345^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 912 + ... + 1204.

2³⁰⁹⁹⁹⁴ is an apocalyptic number.

309994 is a deficient number, since it is larger than the sum of its proper divisors (177752).

309994 is a wasteful number, since it uses less digits than its factorization.

309994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 309994 is about 556.7710480979. The cubic root of 309994 is about 67.6785578796.

The spelling of 309994 in words is "three hundred nine thousand, nine hundred ninety-four".