780613 has 2 divisors, whose sum is σ = 780614. Its totient is φ = 780612.

The previous prime is 780601. The next prime is 780631. The reversal of 780613 is 316087.

Together with next prime (780631) 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., 412164 + 368449 = 642^2 + 607^2 .

It is an emirp because it is prime and its reverse (316087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780613 - 2¹⁷ = 649541 is a prime.

780613 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390306 + 390307.

It is an arithmetic number, because the mean of its divisors is an integer number (390307).

2⁷⁸⁰⁶¹³ is an apocalyptic number.

It is an amenable number.

780613 is a deficient number, since it is larger than the sum of its proper divisors (1).

780613 is an equidigital number, since it uses as much as digits as its factorization.

780613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 780613 is about 883.5230613855. The cubic root of 780613 is about 92.0757488936.

The spelling of 780613 in words is "seven hundred eighty thousand, six hundred thirteen".