9947473 has 2 divisors, whose sum is σ = 9947474.
Its totient is φ = 9947472.
The previous prime is 9947437. The next prime is 9947489. The reversal of 9947473 is 3747499.
It is a happy number.
9947473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
Together with previous prime (9947437) it forms an Ormiston pair, because they use the same digits, order apart.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9381969 + 565504 = 3063^2 + 752^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9947473 is a prime.
9947473 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (9947573) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4973736 + 4973737.
It is an arithmetic number, because the mean of its divisors is an integer number (4973737).
Almost surely, 29947473 is an apocalyptic number.
It is an amenable number.
9947473 is a deficient number, since it is larger than the sum of its proper divisors (1).
9947473 is an equidigital number, since it uses as much as digits as its factorization.
9947473 is an evil number, because the sum of its binary digits is even.
The product of its digits is 190512, while the sum is 43.
The square root of 9947473 is about 3153.9614772536.
The cubic root of 9947473 is about 215.0655866247.
The spelling of 9947473 in words is "nine million, nine hundred forty-seven thousand, four hundred seventy-three".