42684857233 has 2 divisors, whose sum is σ = 42684857234. Its totient is φ = 42684857232.

The previous prime is 42684857221. The next prime is 42684857297. The reversal of 42684857233 is 33275848624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42300971584 + 383885649 = 205672^2 + 19593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42684857233 is a prime.

It is a super-3 number, since 3×42684857233³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42684852233) 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, 21342428616 + 21342428617.

It is an arithmetic number, because the mean of its divisors is an integer number (21342428617).

Almost surely, 2^42684857233 is an apocalyptic number.

It is an amenable number.

42684857233 is a deficient number, since it is larger than the sum of its proper divisors (1).

42684857233 is an equidigital number, since it uses as much as digits as its factorization.

42684857233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 52.

The spelling of 42684857233 in words is "forty-two billion, six hundred eighty-four million, eight hundred fifty-seven thousand, two hundred thirty-three".