820123749763 has 2 divisors, whose sum is σ = 820123749764. Its totient is φ = 820123749762.

The previous prime is 820123749737. The next prime is 820123749773. The reversal of 820123749763 is 367947321028.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820123749763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 820123749763.

It is not a weakly prime, because it can be changed into another prime (820123749703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410061874881 + 410061874882.

It is an arithmetic number, because the mean of its divisors is an integer number (410061874882).

Almost surely, 2^820123749763 is an apocalyptic number.

820123749763 is a deficient number, since it is larger than the sum of its proper divisors (1).

820123749763 is an equidigital number, since it uses as much as digits as its factorization.

820123749763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 820123749763 in words is "eight hundred twenty billion, one hundred twenty-three million, seven hundred forty-nine thousand, seven hundred sixty-three".