947404789 has 4 divisors (see below), whose sum is σ = 947666124. Its totient is φ = 947143456.

The previous prime is 947404751. The next prime is 947404793. The reversal of 947404789 is 987404749.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 303108100 + 644296689 = 17410^2 + 25383^2 .

It is a cyclic number.

It is not a de Polignac number, because 947404789 - 2²³ = 939016181 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 (947404739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125152 + ... + 132505.

It is an arithmetic number, because the mean of its divisors is an integer number (236916531).

Almost surely, 2^947404789 is an apocalyptic number.

It is an amenable number.

947404789 is a deficient number, since it is larger than the sum of its proper divisors (261335).

947404789 is a wasteful number, since it uses less digits than its factorization.

947404789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261334.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 947404789 is about 30779.9413417245. The cubic root of 947404789 is about 982.1515926516.

The spelling of 947404789 in words is "nine hundred forty-seven million, four hundred four thousand, seven hundred eighty-nine".