82780679 has 2 divisors, whose sum is σ = 82780680. Its totient is φ = 82780678.

The previous prime is 82780669. The next prime is 82780699. The reversal of 82780679 is 97608728.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82780679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82780669) 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, 41390339 + 41390340.

It is an arithmetic number, because the mean of its divisors is an integer number (41390340).

Almost surely, 2^82780679 is an apocalyptic number.

82780679 is a deficient number, since it is larger than the sum of its proper divisors (1).

82780679 is an equidigital number, since it uses as much as digits as its factorization.

82780679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 82780679 is about 9098.3888134109. The cubic root of 82780679 is about 435.8225138910.

The spelling of 82780679 in words is "eighty-two million, seven hundred eighty thousand, six hundred seventy-nine".