42687184873 has 2 divisors, whose sum is σ = 42687184874. Its totient is φ = 42687184872.

The previous prime is 42687184831. The next prime is 42687184877. The reversal of 42687184873 is 37848178624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35362050304 + 7325134569 = 188048^2 + 85587^2 .

It is a cyclic number.

It is not a de Polignac number, because 42687184873 - 2⁹ = 42687184361 is a prime.

It is a super-3 number, since 3×42687184873³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (42687184877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21343592436 + 21343592437.

It is an arithmetic number, because the mean of its divisors is an integer number (21343592437).

Almost surely, 2^42687184873 is an apocalyptic number.

It is an amenable number.

42687184873 is a deficient number, since it is larger than the sum of its proper divisors (1).

42687184873 is an equidigital number, since it uses as much as digits as its factorization.

42687184873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14450688, while the sum is 58.

The spelling of 42687184873 in words is "forty-two billion, six hundred eighty-seven million, one hundred eighty-four thousand, eight hundred seventy-three".