305697 has 8 divisors (see below), whose sum is σ = 465856. Its totient is φ = 174672.

The previous prime is 305663. The next prime is 305717. The reversal of 305697 is 796503.

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

It is not a de Polignac number, because 305697 - 2⁶ = 305633 is a prime.

It is a Duffinian number.

305697 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305697.

It is not an unprimeable number, because it can be changed into a prime (305297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7258 + ... + 7299.

It is an arithmetic number, because the mean of its divisors is an integer number (58232).

2³⁰⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

305697 is a deficient number, since it is larger than the sum of its proper divisors (160159).

305697 is a wasteful number, since it uses less digits than its factorization.

305697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 305697 is about 552.8987249036. The cubic root of 305697 is about 67.3643916668.

The spelling of 305697 in words is "three hundred five thousand, six hundred ninety-seven".