821760380107 has 2 divisors, whose sum is σ = 821760380108. Its totient is φ = 821760380106.

The previous prime is 821760380017. The next prime is 821760380153. The reversal of 821760380107 is 701083067128.

Together with previous prime (821760380017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821760380107 is a prime.

It is a super-2 number, since 2×821760380107² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (821760380197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410880190053 + 410880190054.

It is an arithmetic number, because the mean of its divisors is an integer number (410880190054).

Almost surely, 2^821760380107 is an apocalyptic number.

821760380107 is a deficient number, since it is larger than the sum of its proper divisors (1).

821760380107 is an equidigital number, since it uses as much as digits as its factorization.

821760380107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 821760380107 in words is "eight hundred twenty-one billion, seven hundred sixty million, three hundred eighty thousand, one hundred seven".