947257543 has 2 divisors, whose sum is σ = 947257544. Its totient is φ = 947257542.

The previous prime is 947257541. The next prime is 947257583. The reversal of 947257543 is 345752749.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 947257543 - 2¹ = 947257541 is a prime.

Together with 947257541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 947257493 and 947257502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947257541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473628771 + 473628772.

It is an arithmetic number, because the mean of its divisors is an integer number (473628772).

Almost surely, 2^947257543 is an apocalyptic number.

947257543 is a deficient number, since it is larger than the sum of its proper divisors (1).

947257543 is an equidigital number, since it uses as much as digits as its factorization.

947257543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 46.

The square root of 947257543 is about 30777.5493338895. The cubic root of 947257543 is about 982.1007078950.

The spelling of 947257543 in words is "nine hundred forty-seven million, two hundred fifty-seven thousand, five hundred forty-three".