780343 has 2 divisors, whose sum is σ = 780344. Its totient is φ = 780342.

The previous prime is 780323. The next prime is 780347. The reversal of 780343 is 343087.

It is a strong prime.

It is an emirp because it is prime and its reverse (343087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780347) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390171 + 390172.

It is an arithmetic number, because the mean of its divisors is an integer number (390172).

2⁷⁸⁰³⁴³ is an apocalyptic number.

780343 is a deficient number, since it is larger than the sum of its proper divisors (1).

780343 is an equidigital number, since it uses as much as digits as its factorization.

780343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 780343 is about 883.3702508009. The cubic root of 780343 is about 92.0651318875.

The spelling of 780343 in words is "seven hundred eighty thousand, three hundred forty-three".