947812643 has 2 divisors, whose sum is σ = 947812644. Its totient is φ = 947812642.

The previous prime is 947812627. The next prime is 947812651. The reversal of 947812643 is 346218749.

It is a strong prime.

It is an emirp because it is prime and its reverse (346218749) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 947812643 - 2⁴ = 947812627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947812594 and 947812603.

It is not a weakly prime, because it can be changed into another prime (947812673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473906321 + 473906322.

It is an arithmetic number, because the mean of its divisors is an integer number (473906322).

Almost surely, 2^947812643 is an apocalyptic number.

947812643 is a deficient number, since it is larger than the sum of its proper divisors (1).

947812643 is an equidigital number, since it uses as much as digits as its factorization.

947812643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 947812643 is about 30786.5659501023. The cubic root of 947812643 is about 982.2925098858.

The spelling of 947812643 in words is "nine hundred forty-seven million, eight hundred twelve thousand, six hundred forty-three".