42287948909 has 2 divisors, whose sum is σ = 42287948910. Its totient is φ = 42287948908.

The previous prime is 42287948897. The next prime is 42287948951. The reversal of 42287948909 is 90984978224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27810565225 + 14477383684 = 166765^2 + 120322^2 .

It is a cyclic number.

It is not a de Polignac number, because 42287948909 - 2⁴ = 42287948893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42287948959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21143974454 + 21143974455.

It is an arithmetic number, because the mean of its divisors is an integer number (21143974455).

Almost surely, 2^42287948909 is an apocalyptic number.

It is an amenable number.

42287948909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42287948909 is an equidigital number, since it uses as much as digits as its factorization.

42287948909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 42287948909 in words is "forty-two billion, two hundred eighty-seven million, nine hundred forty-eight thousand, nine hundred nine".