5138999 has 4 divisors (see below), whose sum is σ = 5178360. Its totient is φ = 5099640.

The previous prime is 5138977. The next prime is 5139019. The reversal of 5138999 is 9998315.

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 5138999 - 2¹² = 5134903 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 (5138929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19484 + ... + 19745.

It is an arithmetic number, because the mean of its divisors is an integer number (1294590).

Almost surely, 2^5138999 is an apocalyptic number.

5138999 is a deficient number, since it is larger than the sum of its proper divisors (39361).

5138999 is a wasteful number, since it uses less digits than its factorization.

5138999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39360.

The product of its digits is 87480, while the sum is 44.

The square root of 5138999 is about 2266.9360379155. The cubic root of 5138999 is about 172.5677000947.

The spelling of 5138999 in words is "five million, one hundred thirty-eight thousand, nine hundred ninety-nine".