780049 has 2 divisors, whose sum is σ = 780050. Its totient is φ = 780048.

The previous prime is 780047. The next prime is 780061. The reversal of 780049 is 940087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 283024 = 705^2 + 532^2 .

It is an emirp because it is prime and its reverse (940087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780049 - 2¹ = 780047 is a prime.

Together with 780047, it forms a pair of twin primes.

It is a Chen prime.

780049 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 779999 and 780026.

It is not a weakly prime, because it can be changed into another prime (780041) 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, 390024 + 390025.

It is an arithmetic number, because the mean of its divisors is an integer number (390025).

2⁷⁸⁰⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

780049 is a deficient number, since it is larger than the sum of its proper divisors (1).

780049 is an equidigital number, since it uses as much as digits as its factorization.

780049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 780049 is about 883.2038269845. The cubic root of 780049 is about 92.0535683619.

The spelling of 780049 in words is "seven hundred eighty thousand, forty-nine".