5139878 has 4 divisors (see below), whose sum is σ = 7709820. Its totient is φ = 2569938.

The previous prime is 5139877. The next prime is 5139881. The reversal of 5139878 is 8789315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8789315 = 5 ⋅1757863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5139877) 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 as a sum of consecutive naturals, namely, 1284968 + ... + 1284971.

It is an arithmetic number, because the mean of its divisors is an integer number (1927455).

Almost surely, 2^5139878 is an apocalyptic number.

5139878 is a deficient number, since it is larger than the sum of its proper divisors (2569942).

5139878 is a wasteful number, since it uses less digits than its factorization.

5139878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569941.

The product of its digits is 60480, while the sum is 41.

The square root of 5139878 is about 2267.1299036447. The cubic root of 5139878 is about 172.5775384803.

The spelling of 5139878 in words is "five million, one hundred thirty-nine thousand, eight hundred seventy-eight".