993579121 has 4 divisors (see below), whose sum is σ = 1027840500. Its totient is φ = 959317744.

The previous prime is 993579077. The next prime is 993579131. The reversal of 993579121 is 121975399.

993579121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 274266721 + 719312400 = 16561^2 + 26820^2 .

It is a cyclic number.

It is not a de Polignac number, because 993579121 - 2¹⁹ = 993054833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993579131) 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, 17130646 + ... + 17130703.

It is an arithmetic number, because the mean of its divisors is an integer number (256960125).

Almost surely, 2^993579121 is an apocalyptic number.

It is an amenable number.

993579121 is a deficient number, since it is larger than the sum of its proper divisors (34261379).

993579121 is a wasteful number, since it uses less digits than its factorization.

993579121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34261378.

The product of its digits is 153090, while the sum is 46.

The square root of 993579121 is about 31521.0900985356. The cubic root of 993579121 is about 997.8551097350.

The spelling of 993579121 in words is "nine hundred ninety-three million, five hundred seventy-nine thousand, one hundred twenty-one".