305947 has 2 divisors, whose sum is σ = 305948. Its totient is φ = 305946.

The previous prime is 305933. The next prime is 305971. The reversal of 305947 is 749503.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305947 is a prime.

It is not a weakly prime, because it can be changed into another prime (305917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152973 + 152974.

It is an arithmetic number, because the mean of its divisors is an integer number (152974).

2³⁰⁵⁹⁴⁷ is an apocalyptic number.

305947 is a deficient number, since it is larger than the sum of its proper divisors (1).

305947 is an equidigital number, since it uses as much as digits as its factorization.

305947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 305947 is about 553.1247598870. The cubic root of 305947 is about 67.3827502693.

Subtracting 305947 from its reverse (749503), we obtain a square (443556 = 666²).

The spelling of 305947 in words is "three hundred five thousand, nine hundred forty-seven".