827679032869 has 4 divisors (see below), whose sum is σ = 891346650796. Its totient is φ = 764011414944.

The previous prime is 827679032863. The next prime is 827679032879. The reversal of 827679032869 is 968230976728.

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 70323084225 + 757355948644 = 265185^2 + 870262^2 .

It is a cyclic number.

It is not a de Polignac number, because 827679032869 - 2²¹ = 827676935717 is a prime.

It is a super-2 number, since 2×827679032869² (a number of 25 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 (827679032863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31833808944 + ... + 31833808969.

It is an arithmetic number, because the mean of its divisors is an integer number (222836662699).

Almost surely, 2^827679032869 is an apocalyptic number.

It is an amenable number.

827679032869 is a deficient number, since it is larger than the sum of its proper divisors (63667617927).

827679032869 is a wasteful number, since it uses less digits than its factorization.

827679032869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63667617926.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 827679032869 in words is "eight hundred twenty-seven billion, six hundred seventy-nine million, thirty-two thousand, eight hundred sixty-nine".