5179785521 has 2 divisors, whose sum is σ = 5179785522. Its totient is φ = 5179785520.

The previous prime is 5179785517. The next prime is 5179785581. The reversal of 5179785521 is 1255879715.

5179785521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3871950625 + 1307834896 = 62225^2 + 36164^2 .

It is a cyclic number.

It is not a de Polignac number, because 5179785521 - 2² = 5179785517 is a prime.

It is a super-2 number, since 2×5179785521² = 53660356087122482882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5179785521.

It is not a weakly prime, because it can be changed into another prime (5179785581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2589892760 + 2589892761.

It is an arithmetic number, because the mean of its divisors is an integer number (2589892761).

Almost surely, 2^5179785521 is an apocalyptic number.

It is an amenable number.

5179785521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5179785521 is an equidigital number, since it uses as much as digits as its factorization.

5179785521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 50.

The square root of 5179785521 is about 71970.7268339010. The cubic root of 5179785521 is about 1730.2303502289.

The spelling of 5179785521 in words is "five billion, one hundred seventy-nine million, seven hundred eighty-five thousand, five hundred twenty-one".