5079787781 has 4 divisors (see below), whose sum is σ = 5084883852. Its totient is φ = 5074691712.

The previous prime is 5079787747. The next prime is 5079787819. The reversal of 5079787781 is 1877879705.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4868550625 + 211237156 = 69775^2 + 14534^2 .

It is a cyclic number.

It is not a de Polignac number, because 5079787781 - 2⁶ = 5079787717 is a prime.

It is a super-2 number, since 2×5079787781² = 51608487799993807922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5079787781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5079787721) 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, 2546540 + ... + 2548533.

It is an arithmetic number, because the mean of its divisors is an integer number (1271220963).

Almost surely, 2^5079787781 is an apocalyptic number.

It is an amenable number.

5079787781 is a deficient number, since it is larger than the sum of its proper divisors (5096071).

5079787781 is an equidigital number, since it uses as much as digits as its factorization.

5079787781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096070.

The product of its (nonzero) digits is 6914880, while the sum is 59.

The square root of 5079787781 is about 71272.6299570880. The cubic root of 5079787781 is about 1719.0236685708.

The spelling of 5079787781 in words is "five billion, seventy-nine million, seven hundred eighty-seven thousand, seven hundred eighty-one".