82847942677 has 4 divisors (see below), whose sum is σ = 83191710316. Its totient is φ = 82504175040.

The previous prime is 82847942669. The next prime is 82847942699. The reversal of 82847942677 is 77624974828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75774123441 + 7073819236 = 275271^2 + 84106^2 .

It is a cyclic number.

It is not a de Polignac number, because 82847942677 - 2³ = 82847942669 is a prime.

It is a super-2 number, since 2×82847942677² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82847946677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171883458 + ... + 171883939.

It is an arithmetic number, because the mean of its divisors is an integer number (20797927579).

Almost surely, 2^82847942677 is an apocalyptic number.

It is an amenable number.

82847942677 is a deficient number, since it is larger than the sum of its proper divisors (343767639).

82847942677 is a wasteful number, since it uses less digits than its factorization.

82847942677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343767638.

The product of its digits is 75866112, while the sum is 64.

The spelling of 82847942677 in words is "eighty-two billion, eight hundred forty-seven million, nine hundred forty-two thousand, six hundred seventy-seven".