947217 has 4 divisors (see below), whose sum is σ = 1262960. Its totient is φ = 631476.

The previous prime is 947203. The next prime is 947239. The reversal of 947217 is 712749.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 947217 - 2⁸ = 946961 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (947417) 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, 157867 + ... + 157872.

It is an arithmetic number, because the mean of its divisors is an integer number (315740).

2⁹⁴⁷²¹⁷ is an apocalyptic number.

It is an amenable number.

947217 is a deficient number, since it is larger than the sum of its proper divisors (315743).

947217 is a wasteful number, since it uses less digits than its factorization.

947217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315742.

The product of its digits is 3528, while the sum is 30.

The square root of 947217 is about 973.2507385047. The cubic root of 947217 is about 98.2086696261.

The spelling of 947217 in words is "nine hundred forty-seven thousand, two hundred seventeen".