5042138887 has 4 divisors (see below), whose sum is σ = 5081840896. Its totient is φ = 5002436880.

The previous prime is 5042138869. The next prime is 5042138947. The reversal of 5042138887 is 7888312405.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5042138887 - 2²³ = 5033750279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5042138807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19850814 + ... + 19851067.

It is an arithmetic number, because the mean of its divisors is an integer number (1270460224).

Almost surely, 2^5042138887 is an apocalyptic number.

5042138887 is a deficient number, since it is larger than the sum of its proper divisors (39702009).

5042138887 is a wasteful number, since it uses less digits than its factorization.

5042138887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39702008.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 5042138887 is about 71008.0198780391. The cubic root of 5042138887 is about 1714.7662800326.

The spelling of 5042138887 in words is "five billion, forty-two million, one hundred thirty-eight thousand, eight hundred eighty-seven".