5217727861 has 2 divisors, whose sum is σ = 5217727862. Its totient is φ = 5217727860.

The previous prime is 5217727849. The next prime is 5217727891. The reversal of 5217727861 is 1687277125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4790024100 + 427703761 = 69210^2 + 20681^2 .

It is a cyclic number.

It is not a de Polignac number, because 5217727861 - 2⁵ = 5217727829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5217727891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608863930 + 2608863931.

It is an arithmetic number, because the mean of its divisors is an integer number (2608863931).

Almost surely, 2^5217727861 is an apocalyptic number.

It is an amenable number.

5217727861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5217727861 is an equidigital number, since it uses as much as digits as its factorization.

5217727861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 46.

The square root of 5217727861 is about 72233.8415218241. The cubic root of 5217727861 is about 1734.4447681443. Note that the first 3 decimals are identical.

The spelling of 5217727861 in words is "five billion, two hundred seventeen million, seven hundred twenty-seven thousand, eight hundred sixty-one".