830380949921 has 4 divisors (see below), whose sum is σ = 831974771844. Its totient is φ = 828787128000.

The previous prime is 830380949873. The next prime is 830380949963. The reversal of 830380949921 is 129949083038.

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 568606483600 + 261774466321 = 754060^2 + 511639^2 .

It is a cyclic number.

It is not a de Polignac number, because 830380949921 - 2¹⁰ = 830380948897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (830380949821) 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, 796910180 + ... + 796911221.

It is an arithmetic number, because the mean of its divisors is an integer number (207993692961).

Almost surely, 2^830380949921 is an apocalyptic number.

It is an amenable number.

830380949921 is a deficient number, since it is larger than the sum of its proper divisors (1593821923).

830380949921 is a wasteful number, since it uses less digits than its factorization.

830380949921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593821922.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 830380949921 in words is "eight hundred thirty billion, three hundred eighty million, nine hundred forty-nine thousand, nine hundred twenty-one".