2780329 has 2 divisors, whose sum is σ = 2780330.
Its totient is φ = 2780328.
The previous prime is 2780303. The next prime is 2780339. The reversal of 2780329 is 9230872.
2780329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2576025 + 204304 = 1605^2 + 452^2
It is a cyclic number.
It is not a de Polignac number, because 2780329 - 213 = 2772137 is a prime.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 2780329.
It is not a weakly prime, because it can be changed into another prime (2780339) 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, 1390164 + 1390165.
It is an arithmetic number, because the mean of its divisors is an integer number (1390165).
22780329 is an apocalyptic number.
It is an amenable number.
2780329 is a deficient number, since it is larger than the sum of its proper divisors (1).
2780329 is an equidigital number, since it uses as much as digits as its factorization.
2780329 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 6048, while the sum is 31.
The square root of 2780329 is about 1667.4318576781.
The cubic root of 2780329 is about 140.6151333983.
The spelling of 2780329 in words is "two million, seven hundred eighty thousand, three hundred twenty-nine".