306993 has 8 divisors (see below), whose sum is σ = 422656. Its totient is φ = 198000.

The previous prime is 306991. The next prime is 307009. The reversal of 306993 is 399603.

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

It is not a de Polignac number, because 306993 - 2¹ = 306991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 306993.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306993.

It is not an unprimeable number, because it can be changed into a prime (306991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (52832).

2³⁰⁶⁹⁹³ is an apocalyptic number.

It is an amenable number.

306993 is a deficient number, since it is larger than the sum of its proper divisors (115663).

306993 is a wasteful number, since it uses less digits than its factorization.

306993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 306993 is about 554.0694902266. The cubic root of 306993 is about 67.4594543881.

The spelling of 306993 in words is "three hundred six thousand, nine hundred ninety-three".