947855 has 8 divisors (see below), whose sum is σ = 1143072. Its totient is φ = 754528.

The previous prime is 947851. The next prime is 947857. The reversal of 947855 is 558749.

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

It is a cyclic number.

It is not a de Polignac number, because 947855 - 2² = 947851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947855.

It is not an unprimeable number, because it can be changed into a prime (947851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 1788.

It is an arithmetic number, because the mean of its divisors is an integer number (142884).

2⁹⁴⁷⁸⁵⁵ is an apocalyptic number.

947855 is a deficient number, since it is larger than the sum of its proper divisors (195217).

947855 is a wasteful number, since it uses less digits than its factorization.

947855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945.

The product of its digits is 50400, while the sum is 38.

The square root of 947855 is about 973.5784508708. The cubic root of 947855 is about 98.2307142294.

The spelling of 947855 in words is "nine hundred forty-seven thousand, eight hundred fifty-five".