42871877 has 2 divisors, whose sum is σ = 42871878. Its totient is φ = 42871876.

The previous prime is 42871823. The next prime is 42871897. The reversal of 42871877 is 77817824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42627841 + 244036 = 6529^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 42871877 - 2²⁴ = 26094661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42871897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21435938 + 21435939.

It is an arithmetic number, because the mean of its divisors is an integer number (21435939).

Almost surely, 2^42871877 is an apocalyptic number.

It is an amenable number.

42871877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42871877 is an equidigital number, since it uses as much as digits as its factorization.

42871877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 175616, while the sum is 44.

The square root of 42871877 is about 6547.6619491235. The cubic root of 42871877 is about 349.9915018345.

The spelling of 42871877 in words is "forty-two million, eight hundred seventy-one thousand, eight hundred seventy-seven".