780047 has 2 divisors, whose sum is σ = 780048. Its totient is φ = 780046.

The previous prime is 780041. The next prime is 780049. The reversal of 780047 is 740087.

It is a strong prime.

It is an emirp because it is prime and its reverse (740087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780047 - 2⁶ = 779983 is a prime.

Together with 780049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 779998 and 780025.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390023 + 390024.

It is an arithmetic number, because the mean of its divisors is an integer number (390024).

2⁷⁸⁰⁰⁴⁷ is an apocalyptic number.

780047 is a deficient number, since it is larger than the sum of its proper divisors (1).

780047 is an equidigital number, since it uses as much as digits as its factorization.

780047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 780047 is about 883.2026947423. The cubic root of 780047 is about 92.0534896885.

The spelling of 780047 in words is "seven hundred eighty thousand, forty-seven".