42947476993 has 2 divisors, whose sum is σ = 42947476994. Its totient is φ = 42947476992.

The previous prime is 42947476991. The next prime is 42947477003. The reversal of 42947476993 is 39967474924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39343515904 + 3603961089 = 198352^2 + 60033^2 .

It is a cyclic number.

It is not a de Polignac number, because 42947476993 - 2¹ = 42947476991 is a prime.

Together with 42947476991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42947476991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21473738496 + 21473738497.

It is an arithmetic number, because the mean of its divisors is an integer number (21473738497).

Almost surely, 2^42947476993 is an apocalyptic number.

It is an amenable number.

42947476993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42947476993 is an equidigital number, since it uses as much as digits as its factorization.

42947476993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 64.

The spelling of 42947476993 in words is "forty-two billion, nine hundred forty-seven million, four hundred seventy-six thousand, nine hundred ninety-three".