5260021709 has 2 divisors, whose sum is σ = 5260021710. Its totient is φ = 5260021708.

The previous prime is 5260021673. The next prime is 5260021717. The reversal of 5260021709 is 9071200625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3889393225 + 1370628484 = 62365^2 + 37022^2 .

It is a cyclic number.

It is not a de Polignac number, because 5260021709 - 2¹⁶ = 5259956173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5260021759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630010854 + 2630010855.

It is an arithmetic number, because the mean of its divisors is an integer number (2630010855).

Almost surely, 2^5260021709 is an apocalyptic number.

It is an amenable number.

5260021709 is a deficient number, since it is larger than the sum of its proper divisors (1).

5260021709 is an equidigital number, since it uses as much as digits as its factorization.

5260021709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 5260021709 is about 72526.0071215836. The cubic root of 5260021709 is about 1739.1185156194.

The spelling of 5260021709 in words is "five billion, two hundred sixty million, twenty-one thousand, seven hundred nine".