860003730821 has 2 divisors, whose sum is σ = 860003730822. Its totient is φ = 860003730820.

The previous prime is 860003730797. The next prime is 860003730841. The reversal of 860003730821 is 128037300068.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825710246596 + 34293484225 = 908686^2 + 185185^2 .

It is a cyclic number.

It is not a de Polignac number, because 860003730821 - 2⁶ = 860003730757 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 (860003730841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430001865410 + 430001865411.

It is an arithmetic number, because the mean of its divisors is an integer number (430001865411).

Almost surely, 2^860003730821 is an apocalyptic number.

It is an amenable number.

860003730821 is a deficient number, since it is larger than the sum of its proper divisors (1).

860003730821 is an equidigital number, since it uses as much as digits as its factorization.

860003730821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 860003730821 in words is "eight hundred sixty billion, three million, seven hundred thirty thousand, eight hundred twenty-one".