305897 has 4 divisors (see below), whose sum is σ = 308100. Its totient is φ = 303696.

The previous prime is 305873. The next prime is 305917. The reversal of 305897 is 798503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90601 + 215296 = 301^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 305897 - 2¹⁸ = 43753 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305897.

It is not an unprimeable number, because it can be changed into a prime (305857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (77025).

2³⁰⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

305897 is a deficient number, since it is larger than the sum of its proper divisors (2203).

305897 is a wasteful number, since it uses less digits than its factorization.

305897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 305897 is about 553.0795602804. The cubic root of 305897 is about 67.3790793491.

The spelling of 305897 in words is "three hundred five thousand, eight hundred ninety-seven".