780550013 has 2 divisors, whose sum is σ = 780550014. Its totient is φ = 780550012.

The previous prime is 780549997. The next prime is 780550031. The reversal of 780550013 is 310055087.

Together with next prime (780550031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427786489 + 352763524 = 20683^2 + 18782^2 .

It is a cyclic number.

It is not a de Polignac number, because 780550013 - 2⁴ = 780549997 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 (780550313) 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, 390275006 + 390275007.

It is an arithmetic number, because the mean of its divisors is an integer number (390275007).

Almost surely, 2^780550013 is an apocalyptic number.

It is an amenable number.

780550013 is a deficient number, since it is larger than the sum of its proper divisors (1).

780550013 is an equidigital number, since it uses as much as digits as its factorization.

780550013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 780550013 is about 27938.3251645477. The cubic root of 780550013 is about 920.7327232233.

The spelling of 780550013 in words is "seven hundred eighty million, five hundred fifty thousand, thirteen".