42043471669 has 2 divisors, whose sum is σ = 42043471670. Its totient is φ = 42043471668.

The previous prime is 42043471649. The next prime is 42043471721. The reversal of 42043471669 is 96617434024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42018850225 + 24621444 = 204985^2 + 4962^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043471669 - 2¹¹ = 42043469621 is a prime.

It is a super-3 number, since 3×42043471669³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42043471609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021735834 + 21021735835.

It is an arithmetic number, because the mean of its divisors is an integer number (21021735835).

Almost surely, 2^42043471669 is an apocalyptic number.

It is an amenable number.

42043471669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043471669 is an equidigital number, since it uses as much as digits as its factorization.

42043471669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 42043471669 in words is "forty-two billion, forty-three million, four hundred seventy-one thousand, six hundred sixty-nine".