947789 has 4 divisors (see below), whose sum is σ = 954300. Its totient is φ = 941280.

The previous prime is 947783. The next prime is 947803. The reversal of 947789 is 987749.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987749 = 7 ⋅141107.

It can be written as a sum of positive squares in 2 ways, for example, as 168100 + 779689 = 410^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 947789 - 2⁴ = 947773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947783) 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, 3032 + ... + 3329.

It is an arithmetic number, because the mean of its divisors is an integer number (238575).

2⁹⁴⁷⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

947789 is a deficient number, since it is larger than the sum of its proper divisors (6511).

947789 is a wasteful number, since it uses less digits than its factorization.

947789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510.

The product of its digits is 127008, while the sum is 44.

The square root of 947789 is about 973.5445547072. The cubic root of 947789 is about 98.2284342120.

The spelling of 947789 in words is "nine hundred forty-seven thousand, seven hundred eighty-nine".