42243123987 has 6 divisors (see below), whose sum is σ = 61017845772. Its totient is φ = 28162082652.

The previous prime is 42243123973. The next prime is 42243124039. The reversal of 42243123987 is 78932134224.

42243123987 is a `hidden beast` number, since 4 + 2 + 243 + 12 + 398 + 7 = 666.

It is not a de Polignac number, because 42243123987 - 2¹⁰ = 42243122963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42243123907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2346840213 + ... + 2346840230.

It is an arithmetic number, because the mean of its divisors is an integer number (10169640962).

Almost surely, 2^42243123987 is an apocalyptic number.

42243123987 is a deficient number, since it is larger than the sum of its proper divisors (18774721785).

42243123987 is a wasteful number, since it uses less digits than its factorization.

42243123987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693680449 (or 4693680446 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 42243123987 in words is "forty-two billion, two hundred forty-three million, one hundred twenty-three thousand, nine hundred eighty-seven".