321049820729 has 4 divisors (see below), whose sum is σ = 350236168080. Its totient is φ = 291863473380.

The previous prime is 321049820687. The next prime is 321049820747. The reversal of 321049820729 is 927028940123.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-321049820729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321049820779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14593173659 + ... + 14593173680.

It is an arithmetic number, because the mean of its divisors is an integer number (87559042020).

Almost surely, 2^321049820729 is an apocalyptic number.

It is an amenable number.

321049820729 is a deficient number, since it is larger than the sum of its proper divisors (29186347351).

321049820729 is a wasteful number, since it uses less digits than its factorization.

321049820729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29186347350.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 321049820729 in words is "three hundred twenty-one billion, forty-nine million, eight hundred twenty thousand, seven hundred twenty-nine".