947439973 has 2 divisors, whose sum is σ = 947439974. Its totient is φ = 947439972.

The previous prime is 947439929. The next prime is 947439979. The reversal of 947439973 is 379934749.

It is a happy number.

947439973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711448929 + 235991044 = 26673^2 + 15362^2 .

It is an emirp because it is prime and its reverse (379934749) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947439973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947439979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473719986 + 473719987.

It is an arithmetic number, because the mean of its divisors is an integer number (473719987).

Almost surely, 2^947439973 is an apocalyptic number.

It is an amenable number.

947439973 is a deficient number, since it is larger than the sum of its proper divisors (1).

947439973 is an equidigital number, since it uses as much as digits as its factorization.

947439973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 55.

The square root of 947439973 is about 30780.5128774684. The cubic root of 947439973 is about 982.1637506346.

The spelling of 947439973 in words is "nine hundred forty-seven million, four hundred thirty-nine thousand, nine hundred seventy-three".