828281931797 has 4 divisors (see below), whose sum is σ = 829538809440. Its totient is φ = 827025054156.

The previous prime is 828281931793. The next prime is 828281931803. The reversal of 828281931797 is 797139182828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 828281931797 - 2² = 828281931793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828281931793) 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, 628437833 + ... + 628439150.

It is an arithmetic number, because the mean of its divisors is an integer number (207384702360).

Almost surely, 2^828281931797 is an apocalyptic number.

It is an amenable number.

828281931797 is a deficient number, since it is larger than the sum of its proper divisors (1256877643).

828281931797 is a wasteful number, since it uses less digits than its factorization.

828281931797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256877642.

The product of its digits is 24385536, while the sum is 65.

The spelling of 828281931797 in words is "eight hundred twenty-eight billion, two hundred eighty-one million, nine hundred thirty-one thousand, seven hundred ninety-seven".