42871983 has 16 divisors (see below), whose sum is σ = 71268096. Its totient is φ = 22271040.

The previous prime is 42871979. The next prime is 42871991. The reversal of 42871983 is 38917824.

It is not a de Polignac number, because 42871983 - 2² = 42871979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42871993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92566 + ... + 93027.

It is an arithmetic number, because the mean of its divisors is an integer number (4454256).

Almost surely, 2^42871983 is an apocalyptic number.

42871983 is a deficient number, since it is larger than the sum of its proper divisors (28396113).

42871983 is a wasteful number, since it uses less digits than its factorization.

42871983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185614.

The product of its digits is 96768, while the sum is 42.

The square root of 42871983 is about 6547.6700436109. The cubic root of 42871983 is about 349.9917902836.

The spelling of 42871983 in words is "forty-two million, eight hundred seventy-one thousand, nine hundred eighty-three".