306998 has 4 divisors (see below), whose sum is σ = 460500. Its totient is φ = 153498.

The previous prime is 306991. The next prime is 307009. The reversal of 306998 is 899603.

306998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899603 = 43 ⋅20921.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306998.

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

306998 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 76748 + ... + 76751.

It is an arithmetic number, because the mean of its divisors is an integer number (115125).

2³⁰⁶⁹⁹⁸ is an apocalyptic number.

306998 is a deficient number, since it is larger than the sum of its proper divisors (153502).

306998 is a wasteful number, since it uses less digits than its factorization.

306998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153501.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 306998 is about 554.0740022777. The cubic root of 306998 is about 67.4598206239.

The spelling of 306998 in words is "three hundred six thousand, nine hundred ninety-eight".