947229 has 4 divisors (see below), whose sum is σ = 1262976. Its totient is φ = 631484.

The previous prime is 947203. The next prime is 947239. The reversal of 947229 is 922749.

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, and also an emirpimes, since its reverse is a distinct semiprime: 922749 = 3 ⋅307583.

It is a cyclic number.

It is not a de Polignac number, because 947229 - 2⁵ = 947197 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 947229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947239) 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 in 3 ways as a sum of consecutive naturals, for example, 157869 + ... + 157874.

It is an arithmetic number, because the mean of its divisors is an integer number (315744).

2⁹⁴⁷²²⁹ is an apocalyptic number.

It is an amenable number.

947229 is a deficient number, since it is larger than the sum of its proper divisors (315747).

947229 is a wasteful number, since it uses less digits than its factorization.

947229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315746.

The product of its digits is 9072, while the sum is 33.

The square root of 947229 is about 973.2569033919. The cubic root of 947229 is about 98.2090843495.

It can be divided in two parts, 947 and 229, that added together give a triangular number (1176 = T₄₈).

The spelling of 947229 in words is "nine hundred forty-seven thousand, two hundred twenty-nine".