82776897 has 20 divisors (see below), whose sum is σ = 141320256. Its totient is φ = 47300760.

The previous prime is 82776871. The next prime is 82776899. The reversal of 82776897 is 79867728.

It is not a de Polignac number, because 82776897 - 2⁶ = 82776833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82776899) 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 in 19 ways as a sum of consecutive naturals, for example, 72429 + ... + 73562.

Almost surely, 2^82776897 is an apocalyptic number.

It is an amenable number.

82776897 is a deficient number, since it is larger than the sum of its proper divisors (58543359).

82776897 is a wasteful number, since it uses less digits than its factorization.

82776897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146010 (or 146001 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 82776897 is about 9098.1809720405. The cubic root of 82776897 is about 435.8158766504.

The spelling of 82776897 in words is "eighty-two million, seven hundred seventy-six thousand, eight hundred ninety-seven".