305047 has 2 divisors, whose sum is σ = 305048. Its totient is φ = 305046.

The previous prime is 305033. The next prime is 305069. The reversal of 305047 is 740503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305047 - 2¹¹ = 302999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305017) by changing a digit.

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, 152523 + 152524.

It is an arithmetic number, because the mean of its divisors is an integer number (152524).

2³⁰⁵⁰⁴⁷ is an apocalyptic number.

305047 is a deficient number, since it is larger than the sum of its proper divisors (1).

305047 is an equidigital number, since it uses as much as digits as its factorization.

305047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 305047 is about 552.3106010208. The cubic root of 305047 is about 67.3166124107.

The spelling of 305047 in words is "three hundred five thousand, forty-seven".