82780141 has 2 divisors, whose sum is σ = 82780142. Its totient is φ = 82780140.

The previous prime is 82780129. The next prime is 82780147. The reversal of 82780141 is 14108728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73599241 + 9180900 = 8579^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 82780141 - 2¹⁵ = 82747373 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 (82780147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41390070 + 41390071.

It is an arithmetic number, because the mean of its divisors is an integer number (41390071).

Almost surely, 2^82780141 is an apocalyptic number.

It is an amenable number.

82780141 is a deficient number, since it is larger than the sum of its proper divisors (1).

82780141 is an equidigital number, since it uses as much as digits as its factorization.

82780141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 82780141 is about 9098.3592476886. The cubic root of 82780141 is about 435.8215697374.

Adding to 82780141 its reverse (14108728), we get a palindrome (96888869).

The spelling of 82780141 in words is "eighty-two million, seven hundred eighty thousand, one hundred forty-one".