780973 has 2 divisors, whose sum is σ = 780974.
Its totient is φ = 780972.
The previous prime is 780971. The next prime is 780991. The reversal of 780973 is 379087.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 619369 + 161604 = 787^2 + 402^2
It is an emirp because it is prime and its reverse (379087) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 780973 - 21 = 780971 is a prime.
Together with 780971, it forms a pair of twin primes.
780973 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (780971) 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, 390486 + 390487.
It is an arithmetic number, because the mean of its divisors is an integer number (390487).
2780973 is an apocalyptic number.
It is an amenable number.
780973 is a deficient number, since it is larger than the sum of its proper divisors (1).
780973 is an equidigital number, since it uses as much as digits as its factorization.
780973 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 10584, while the sum is 34.
The square root of 780973 is about 883.7267677286.
The cubic root of 780973 is about 92.0899010942.
The spelling of 780973 in words is "seven hundred eighty thousand, nine hundred seventy-three".