993421409 has 8 divisors (see below), whose sum is σ = 1013845920. Its totient is φ = 973116576.

The previous prime is 993421397. The next prime is 993421423. The reversal of 993421409 is 904124399.

993421409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 993421409 - 2²⁰ = 992372833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993421489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13052 + ... + 46445.

It is an arithmetic number, because the mean of its divisors is an integer number (126730740).

Almost surely, 2^993421409 is an apocalyptic number.

It is an amenable number.

993421409 is a deficient number, since it is larger than the sum of its proper divisors (20424511).

993421409 is a wasteful number, since it uses less digits than its factorization.

993421409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59839.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 993421409 is about 31518.5883091232. The cubic root of 993421409 is about 997.8023100303.

The spelling of 993421409 in words is "nine hundred ninety-three million, four hundred twenty-one thousand, four hundred nine".