5125238779 has 4 divisors (see below), whose sum is σ = 5263758784. Its totient is φ = 4986718776.

The previous prime is 5125238777. The next prime is 5125238821. The reversal of 5125238779 is 9778325215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9778325215 = 5 ⋅1955665043.

It is a cyclic number.

It is not a de Polignac number, because 5125238779 - 2¹ = 5125238777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5125238777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69259947 + ... + 69260020.

It is an arithmetic number, because the mean of its divisors is an integer number (1315939696).

Almost surely, 2^5125238779 is an apocalyptic number.

5125238779 is a deficient number, since it is larger than the sum of its proper divisors (138520005).

5125238779 is a wasteful number, since it uses less digits than its factorization.

5125238779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138520004.

The product of its digits is 1058400, while the sum is 49.

The square root of 5125238779 is about 71590.7730018331. The cubic root of 5125238779 is about 1724.1353957711.

The spelling of 5125238779 in words is "five billion, one hundred twenty-five million, two hundred thirty-eight thousand, seven hundred seventy-nine".