947305 has 8 divisors (see below), whose sum is σ = 1164744. Its totient is φ = 739200.

The previous prime is 947299. The next prime is 947327. The reversal of 947305 is 503749.

It can be written as a sum of positive squares in 4 ways, for example, as 576 + 946729 = 24^2 + 973^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-947305 is a prime.

It is a Duffinian number.

947305 is a lucky number.

It is an unprimeable 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 in 7 ways as a sum of consecutive naturals, for example, 2106 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (145593).

2⁹⁴⁷³⁰⁵ is an apocalyptic number.

It is an amenable number.

947305 is a deficient number, since it is larger than the sum of its proper divisors (217439).

947305 is a wasteful number, since it uses less digits than its factorization.

947305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667.

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

The square root of 947305 is about 973.2959467706. The cubic root of 947305 is about 98.2117108495.

Subtracting from 947305 its reverse (503749), we obtain a square (443556 = 666²).

The spelling of 947305 in words is "nine hundred forty-seven thousand, three hundred five".