82715777 has 2 divisors, whose sum is σ = 82715778. Its totient is φ = 82715776.

The previous prime is 82715767. The next prime is 82715807. The reversal of 82715777 is 77751728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75186241 + 7529536 = 8671^2 + 2744^2 .

It is a cyclic number.

It is not a de Polignac number, because 82715777 - 2¹⁶ = 82650241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82715767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41357888 + 41357889.

It is an arithmetic number, because the mean of its divisors is an integer number (41357889).

Almost surely, 2^82715777 is an apocalyptic number.

It is an amenable number.

82715777 is a deficient number, since it is larger than the sum of its proper divisors (1).

82715777 is an equidigital number, since it uses as much as digits as its factorization.

82715777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192080, while the sum is 44.

The square root of 82715777 is about 9094.8214385990. The cubic root of 82715777 is about 435.7085857434.

The spelling of 82715777 in words is "eighty-two million, seven hundred fifteen thousand, seven hundred seventy-seven".