82543977 has 12 divisors (see below), whose sum is σ = 119850484. Its totient is φ = 54743040.

The previous prime is 82543943. The next prime is 82543991. The reversal of 82543977 is 77934528.

82543977 is a `hidden beast` number, since 8 + 254 + 397 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 48776256 + 33767721 = 6984^2 + 5811^2 .

It is not a de Polignac number, because 82543977 - 2⁶ = 82543913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82543927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22024 + ... + 25497.

Almost surely, 2^82543977 is an apocalyptic number.

It is an amenable number.

82543977 is a deficient number, since it is larger than the sum of its proper divisors (37306507).

82543977 is a wasteful number, since it uses less digits than its factorization.

82543977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47720 (or 47717 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 82543977 is about 9085.3715939415. The cubic root of 82543977 is about 435.4067222543.

The spelling of 82543977 in words is "eighty-two million, five hundred forty-three thousand, nine hundred seventy-seven".