780971 has 2 divisors, whose sum is σ = 780972.
Its totient is φ = 780970.
The previous prime is 780961. The next prime is 780973. The reversal of 780971 is 179087.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 780971 - 214 = 764587 is a prime.
Together with 780973, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (780973) 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, 390485 + 390486.
It is an arithmetic number, because the mean of its divisors is an integer number (390486).
2780971 is an apocalyptic number.
780971 is a deficient number, since it is larger than the sum of its proper divisors (1).
780971 is an equidigital number, since it uses as much as digits as its factorization.
780971 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3528, while the sum is 32.
The square root of 780971 is about 883.7256361564.
The cubic root of 780971 is about 92.0898224829.
The spelling of 780971 in words is "seven hundred eighty thousand, nine hundred seventy-one".