780730030121 has 2 divisors, whose sum is σ = 780730030122. Its totient is φ = 780730030120.

The previous prime is 780730030043. The next prime is 780730030159. The reversal of 780730030121 is 121030037087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719382170896 + 61347859225 = 848164^2 + 247685^2 .

It is a cyclic number.

It is not a de Polignac number, because 780730030121 - 2¹⁸ = 780729767977 is a prime.

It is not a weakly prime, because it can be changed into another prime (780730030021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390365015060 + 390365015061.

It is an arithmetic number, because the mean of its divisors is an integer number (390365015061).

Almost surely, 2^780730030121 is an apocalyptic number.

It is an amenable number.

780730030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

780730030121 is an equidigital number, since it uses as much as digits as its factorization.

780730030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 780730030121 in words is "seven hundred eighty billion, seven hundred thirty million, thirty thousand, one hundred twenty-one".